Glossary

0-9

0-10V: Wired analog low-voltage control that varies DC voltage between 0 and 10 volts (or 1 and 10 volts) to produce varying light output.

1-Lamp External Driver (UL Type C) Lamps: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category employ lamp holders to connect to the fixture being retrofitted, do not operate utilizing the existing fluorescent ballast, and require rewiring of the existing fixture to replace the ballast with an external driver. The lamp holders are then wired to receive only the low-voltage electricity that is supplied by that external driver. (See Testing and Reporting Requirements for Linear Replacement Lamps for more detail on testing requirements.) Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

1×4 Luminaires for Ambient Lighting of Interior Commercial Spaces: Common recessed, suspended, or surface-mounted fixtures intended to provide ambient lighting in settings such as office spaces, schools, retail stores, and other commercial environments. Products submitted in these categories must meet the stated form factors with a tolerance of ±4 inches.

2′ T8 Lamps: LED lamps intended to replace 2-foot T8 or T12 fluorescent lamps. These LED lamps shall be 24 inches long and employ a G13 base. Marketing material shall indicate that they are intended to replace T8 fluorescent lamps of the same length. Products of different lengths and bases are not eligible under this general application. Products intended to operate on magnetic ballasts are not eligible.

2G11 Base Lamps: Lamps with 2G11 bases greater than or equal to twenty inches in length, designed to replace compact fluorescent lamps (CFLs). 2G11 UL Type A lamps (designed to operate utilizing the existing CFL ballast), and 2G11 UL Type B (designed to operate utilizing direct line voltage), 2G11 UL Type C (designed to operate utilizing a non-integral driver), and 2G11 UL dual mode (designed to operate utilizing the existing CFL ballast or direct line voltage) are all eligible. At this time, Type A products are only eligible if they can operate utilizing specific ballast types. Please see the Testing Requirements for more detail. Replacement lamps designed to operate utilizing magnetic ballasts, or other types of electronic ballasts not specified, are not eligible at this time.

2-lamp External Driver (UL Type C) Lamps: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category employ lamp holders to connect to the fixture being retrofitted, do not operate utilizing the existing fluorescent ballast, and require rewiring of the existing fixture to replace the ballast with an external driver. The lamp holders are then wired to receive only the low-voltage electricity that is supplied by that external driver. (See Testing and Reporting Requirements for Linear Replacement Lamps for more detail on testing requirements.) Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

2×2 Luminaires for Ambient Lighting of Interior Commercial Spaces: Common recessed, suspended, or surface-mounted fixtures intended to provide ambient lighting in settings such as office spaces, schools, retail stores, and other commercial environments. Products submitted in these categories must meet the stated form factors with a tolerance of ±4 inches.

2×4 Luminaires for Ambient Lighting of Interior Commercial Spaces: Common recessed, suspended, or surface-mounted fixtures intended to provide ambient lighting in settings such as office spaces, schools, retail stores, and other commercial environments. Products submitted in these categories must meet the stated form factors with a tolerance of ±4 inches.

3′ T8 Lamps: LED lamps intended to replace 3-foot T8 or T12 fluorescent lamps. These LED lamps shall be 36 inches long and employ a G13 base. Marketing material shall indicate that they are intended to replace T8 fluorescent lamps of the same length. Products of different lengths and bases are not eligible under this general application. Products intended to operate on magnetic ballasts are not eligible.

3-lamp External Driver (UL Type C) Lamps: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category employ lamp holders to connect to the fixture being retrofitted, do not operate utilizing the existing fluorescent ballast, and require rewiring of the existing fixture to replace the ballast with an external driver. The lamp holders are then wired to receive only the low-voltage electricity that is supplied by that external driver. (See Testing and Reporting Requirements for Linear Replacement Lamps for more detail on testing requirements.) Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

4′ T5 Lamps: LED lamps intended to replace T5 fluorescent lamps (note, not T5 High Output or T5HO). These LED lamps shall be 46 inches long and employ a G5 base. Marketing material shall indicate that they are intended to replace T5 fluorescent lamps of the same length. Products of different lengths, bases, or marketed as intended to replace other types of fluorescent lamps are not eligible under this general application.

4′ T5HO Lamps: LED lamps intended to replace T5HO fluorescent lamps. These LED lamps shall be 46 inches long and employ a G5 base. Marketing material shall indicate that they are intended to replace T5HO fluorescent lamps of the same length. Products of different lengths, bases, or marketed as intended to replace other types of fluorescent lamps are not eligible under this general application.

4′ T8 Lamps: LED lamps intended to replace 4-foot T8 or T12 fluorescent lamps. These LED lamps shall be 48 inches long and employ a G13 base. Marketing material shall indicate that they are intended to replace T8 fluorescent lamps of the same length. Products of different lengths and bases are not eligible under this general application. Products intended to operate on magnetic ballasts are not eligible.

4-lamp External Driver (UL Type C) Lamps: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category employ lamp holders to connect to the fixture being retrofitted, do not operate utilizing the existing fluorescent ballast, and require rewiring of the existing fixture to replace the ballast with an external driver. The lamp holders are then wired to receive only the low-voltage electricity that is supplied by that external driver. (See Testing and Reporting Requirements for Linear Replacement Lamps for more detail on testing requirements.) Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

4-Step Quadrangle: Quadrangles with defined (x, y) and (u’, v’) chromaticity coordinates of the center points and the four corners. The size of quadrangles corresponds to the size of 4-step MacAdam ellipses used in ANSI C78.377. Note that the sides of the quadrangles along the Planckian locus are not exactly straight lines, but slightly curved.

6-lamp External Driver (UL Type C) Lamps: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category employ lamp holders to connect to the fixture being retrofitted, do not operate utilizing the existing fluorescent ballast, and require rewiring of the existing fixture to replace the ballast with an external driver. The lamp holders are then wired to receive only the low-voltage electricity that is supplied by that external driver. (See Testing and Reporting Requirements for Linear Replacement Lamps for more detail on testing requirements.) Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

7-Step Quadrangle: The tolerances of CCT and D_uv are calculated using the defined equations, and a corresponding quadrangle is given, which has approximately the same size as the 7-step MacAdam ellipses.

8′ T8 Lamps: LED lamps intended to replace 8-foot T8 or T12 fluorescent lamps. These LED lamps shall be 96 inches long and employ a FA8 base. Marketing material shall indicate that they are intended to replace T8 fluorescent lamps of the same length. Products of different lengths and bases are not eligible under this general application. Products intended to operate on magnetic ballasts are not eligible.

A

Absolute Tolerance: The total tolerance that results from multiple tolerances compounded on each other.

AC De-Rated: DC-powered fixture performance values which have been adjusted to account for AC-to-DC power conversion efficiency.

AC to DC Power Source: The device(s) that connect AC mains to the lines directly providing DC input power to the DC/PoE product. Though DC/PoE products may be used entirely disconnected from the AC power grid, the primary focus of this policy is grid-connected SSL lighting. A DC Power Source may be more typically known as any of the following: AC-to-DC Power Converter; Power over Ethernet Power Sourcing Equipment (PoE PSE), also known as a PoE Switch; or AC/DC Multi-Directional Inverter.

Allowance: An adjustment to a technical threshold for products that meet specific requirements. The DLC will grant allowances to efficacy requirements, applicable to both tested and reported performance values, to offset potential efficacy tradeoffs due to these enhanced quality features.

Ancillary Loads: Components or accessories such as controllers, sensors, and cooling fans that draw power but do not contribute to the total light output.

Angle Interpolation: The reported intensity data at the reported horizontal and/or vertical angles have been interpolated with respect to the laboratory measurements.

Angular Resolution: For products tested with a goniophotometer, angular scanning resolution defines the increment between vertical and horizontal angles scanned.

ANSI Nominal Chromaticity Range: ANSI C78.377-2015 defines chromaticity ranges associated with CCT designations for nominally white light sources, using the CIE 1976 (u’, v’) chromaticity diagram. Each bin represents a range of chromaticity, so sources with the same nominal designation may not match.

Application Information: Information on the intended end use, including the controlled environment and lighting scheme.

Architectural Flood and Spot Luminaires: Directional luminaires intended to highlight architecture, objects and areas in outdoor lighting, which do not include roadway or tunnel lighting. May include billboard lighting. Manufacturers must follow NEMA guidelines for declaring beam spread.

Area Lighting: Non-directional outdoor illumination of general spaces not associated with roadways, structures, building facades, landscape, or signage. Examples include lighting for parking areas, walkways, or building grounds.

Array: An assembly of light emitting diode (LED) packages (components), or dies on a printed circuit board or substrate, possibly with optical elements and additional thermal, mechanical, and electrical interfaces that are intended to connect to the load side of an LED driver. Power source and ANSI standard base are not incorporated into the device. The device cannot be connected directly to the branch circuit.

Auxiliary Shielding: Supplemental optical components used to block or deflect light from certain directions. Auxiliary Shielding may be internal or external to the luminaire.

Azimuth: The angular distance between the vertical plane through a direction to a distant object or sky position, or the facing direction of a building façade, and a reference direction (typically North or South).

B

Bare Lamp: The DLC defines bare lamp as the performance characteristics of a replacement lamp when operated outside of a luminaire or retrofit kit, including the effects of an external ballast (for Type A and Dual Mode lamps) or driver (for Type C lamps).

Beam Angle: The angle between the two opposite directions in which the average intensity is 50% of the center beam intensity as measured in the azimuthal plane perpendicular to and at the center of the linear replacement lamp axis.

Benchtop Testing: Electrical measurements performed by a manufacturer that are not from a certified testing lab.

Blackbody Locus: The locus of points on a chromaticity diagram representing the chromaticities of blackbodies having various (color) temperatures.

Bluetooth: Wireless digital communication protocol developed and maintained by the Bluetooth Special Interest Group (SIG). Uses short-range RF to communicate with other nearby Bluetooth-enabled devices.

Bollards: Architectural outdoor lighting fixtures comprising short, upright ground-mounted units, typically giving off light from the top or the sides, and used to illuminate walkways, steps, or pathways.

Bracket: A method of designating and displaying non-performance affecting product options on a QPL listing. For example, a product that has multiple exterior paint colors which do not affect performance may include all options in brackets as “[WH, BLK, SLV, GRY]” or “[All Options]” within a single model number.

BUG: The IES Luminaire Classification System (LCS) that defines the distribution of light from a luminaire within three primary solid angles: forward light, backlight and uplight. These are further divided into ten secondary solid angles as described in IES TM-15-11. The BUG rating is then determined using Addendum A for IES TM-15-11 according to a luminaire’s lumen output within the secondary solid angle zones as defined in the document.

C

Calculated Scaling: Mathematical characterization of luminaire performance based on manufacturer-developed scaling methodology. The manufacturer must provide a description of the scaling methodology employed and the technical basis for its validity.

Candela Array: A list of candela values corresponding to each vertical angle of photometry. The order of the candela values shall exactly correspond to the list of vertical angles. Successive planes are listed in a sequence corresponding to the list of horizontal angles.

Category: A grouping of SSL products by broad application type. Eligible categories include indoor luminaires, indoor retrofit kits, outdoor luminaires, outdoor retrofit kits, linear replacement lamps, mogul screw-base replacements for HID lamps, and four pin-base replacement lamps for CFLs.

CCT Bin: The IES defines bin as “A restricted range of LED performance characteristics used to delimit a subset of LEDs near a nominal LED performance as identified by chromaticity, photometry, and/or forward-voltage performance.” Products within a CCT bin have been sorted by chromaticity according to ANSI/NEMA C78.377-2017.

Certificate of Compliance: All products are required to submit a compliance certificate from an approved safety certification organization relevant in the United States or Canada. This compliance document shall bear the manufacturers name and will be proof that the products listed have been investigated by the safety organization and found to be in compliance with the standards listed on the certificate. The name of this document varies by safety organization; however, it is commonly referred to as a Certificate of Compliance or Authorization to Mark.

Certification: The provision by an independent body of written assurance (a certificate) that the product, service or system in question meets specific requirements. Accreditation – the formal recognition by an independent body, generally known as an accreditation body, that a certification body operates according to international standards.

Child Product: Products for which test data is not listed on the QPL.

Chromaticity: The generalized property of light representing concepts including spectrum, color temperature, correlated color temperature, chromaticity, etc.

Chromaticity Coordinates: The ratios of each of the tristimulus values (the amounts of each of three specific primaries required to match the color of the light) of the color to the sum of the three tristimulus values.

Cloud Services: Standards for cloud services that address secure integration with services from a remote cloud computing provider.

Color Changing/Tuning: The capability to alter the output and color of tunable white and/or variable color output luminaires via a dedicated control interface(s). To demonstrate compliance with this capability, the interface(s) must be clearly described in the product literature and allow for at least two CCT settings. These settings may be described in terms of CCT, such as 3000K or 5000K, or simple descriptive terms for the desired setting such as “Night” or “Day.” The product literature must also specify installation and configuration requirements to
implement this functionality.

Color Maintenance: A product’s ability to maintain a specific chromaticity over time. This is the spectral corollary to luminous flux maintenance, which describes depreciation in luminous flux over time.

Color of Light: See Chromaticity and D_uv

Color Rendering Index (CRI): A measure of the degree of color shift that objects undergo when illuminated by the light source, as compared with the color of those same objects when illuminated by a reference source of comparable color temperature.

Color Rendition: A comprehensive system for characterizing how a light source will make colors appear, provided by ANSI/IES TM-30-20.

Color Rendition (of Objects): Effect of an illuminant on the color appearance of objects by conscious or subconscious comparison with their color appearance under a reference illuminant.

Communication Between Multiple Control Points: See Communication Method Between Control System Components

Communication Method Between Control System Components: The communication protocol used to exchange information between multiple control points such as sensors, controllers, and luminaires. Communication can be achieved wired or wirelessly.

Communication Method Between the Driver and Control System: The wired communication protocol that is used to communicate the desired dimming level from a sensor or controller to a driver. The signal may be analog, such as 0-10V, or digital, such as DALI.

Compatibility Testing: System-level testing of Four Pin-Base Replacement Lamps for CFLs with a variety of ballasts to confirm operational compatibility. Testing must be performed on each ballast specified in the Testing and Reporting Requirements for Four Pin-Base Replacement Lamps for CFLs.

Compliance Certificate (OEM): All products are required to submit a compliance certificate from an approved safety certification organization relevant in the United States or Canada. This compliance document shall bear the Original Equipment Manufacturers (OEM) name and will be proof that the products listed have been investigated by the safety organization and found to be in compliance with the standards listed on the certificate. The name of this document varies by safety organization; however, it is commonly referred to as a Certificate of Compliance or Authorization to Mark.

Compliance Certificate (Private Label): In addition to a compliance certificate from the OEM, the private labeler must also submit a compliance certificate from an approved safety certification organization which bears the private labeler’s name and unique file number.

Components (NLC): Standards that address the cybersecurity of each individual physical end device in a networked system.

Connector/Transmission Hardware: The hardware integrated into the product that enables it to physically connect with and receive control signals from a controller or other device.

Continuous Dimming: A lighting control strategy that varies the light output of a lighting system over a continuous range from full light output to a minimum light output without flickering in imperceptible steps. To achieve the perception of smooth transitions, one hundred or more steps are required. In contrast, stepped dimming controls the lighting system at a small number of discrete levels, typically fewer than 5.

Continuously Variable Input Signals: Control protocols such as such as 0-10V DC, an established protocol such as DALI or DMX, a proprietary control signal, setting options described in terms of CCT such as 3000K or 5000K, or simple descriptive terms such as “Night” or “Day.”

Control Capabilities: The ability of a luminaire or device to provide or perform lighting control functions beyond on/off. Examples include dimming, high-end trim, occupancy sensing, and energy monitoring.

Control Channel: A conceptual group of luminaires, not necessarily based on electrical circuit loading. These control zones form the building blocks of control system design. (Also called Control Group or Control Zone).

Control Communication: The method and capability of a lighting system to receive and implement commanded changes to the operation, dimmed state, color setting, timing, etc.

Control Interface Documentation: Description of the method of the input control, photos of control input location and control input mechanism, reference to any control standards or protocols utilized, and instructions for how to achieve the settings required in the testing section.

Control Module: See Controller

Control Persistence: The capability of a networked lighting control system’s lowest-level (“edge device”) luminaire/lamp controllers to execute three energy saving strategies (occupancy sensing, daylight harvesting, and high-end trim) at a room-level, or finer, resolution in the absence of communications with the next higher networked element in the system’s topology.

Controlled Environment: Buildings or structures wherein electric lighting and other inputs (e.g., air temperature, humidity, and water consumption) can be controlled to grow crops.

Corrected UGR Table: Refers to a set of UGR values presented in the same format as the uncorrected UGR table with the same pre-set room definitions but corrected using the total luminous flux of the luminaire.

Corrected UGR Value: UGR values presented in the same format as uncorrected UGR values with the same pre-set room definitions but corrected using the total luminous flux of the luminaire.

Correlated Color Temperature (CCT): The thermodynamic temperature of a blackbody whose chromaticity most nearly resembles that of the light source. Expressed in kelvin (K).

Cybersecurity: A cybersecurity certification that meets the DLC criteria. The current standards are shown in NLC 5.0 Table CS-1 and listed here: ANSI/UL 2900-1, IEC 62443, SOC 2, ISO 27001, ISO 27017 (with 27001), FedRAMP, CSA STAR, ioXt. The current services are shown in NLC 5.0 Table CS-2 and listed here: UL IoT Security Rating (UL 1376), CSA Cybersecurity Verification Program (CVP) (CSA T200), Intertek Cyber Assured. Documentation requirements to demonstrate certification are shown in NLC 5.0 Tables CS-2 and CS-3.

D

DALI: A standard lighting control protocol where each luminaire is assigned a unique address and responds to data signals distributed through a common communication line.

Daylight Harvesting/Photocell Control: The capability to automatically affect the operation of lighting or other equipment based on the amount of daylight and/or ambient light that is present in a space, area, or exterior environment. This capability is typically called daylight harvesting for interior systems, and photocell control for exterior systems.

Daylight Sensor: Sensors that can automatically affect the operation of lighting or other equipment based on the amount of daylight and/or ambient light that is present in a space, area.

DC Power Source: The device(s) that connect AC mains to the lines directly providing DC input power to the DC/PoE product. Though DC/PoE products may be used entirely disconnected from the AC power grid, the primary focus of this policy is grid-connected SSL lighting. A DC Power Source may be more typically known as any of the following: AC-to-DC Power Converter; Power over Ethernet Power Sourcing Equipment (PoE PSE), also known as a PoE Switch; or AC/DC Multi-Directional Inverter.

DC to DC Power Source: An LED driver that is typically integrated into the luminaire that converts the DC voltage received at the DC luminaire into the DC voltage required to operate the LEDs in the lamp, luminaire, or retrofit kit. Not all DC/PoE lamps, luminaires or retrofit kits require a DC-to-DC driver.

DC/PoE DC Efficacy: This field lists the worst-case efficacy of DC/PoE SSL products, which is different from the current “Efficacy” field for existing products. The existing “Efficacy” field on DLC QPL has been changed to “AC Efficacy” to clearly differentiate from the “DC Efficacy” of DC/PoE products.

DC/PoE System Type: A QPL field that applies to all SSL products and is populated with text as “AC”, “DC”, or “PoE”.

DC/PoE Test Voltage: This QPL field is required for DC/PoE SSL products and may also be applied to existing AC SSL products. It is a numerical value that lists the voltage from the LM-79 test report (e.g., 24 Volts, 380 Volts, etc.) that corresponds to the worst-case luminous efficacy listed for that product.

DC/PoE Voltage Range: This QPL field applies to both AC and DC SSL products and lists the nominal input voltage range for the product (e.g., 120-277VAC, 44-57VDC).

DC-to-DC Driver: An LED driver that is typically integrated into the luminaire that converts the DC voltage received at the DC luminaire into the DC voltage required to operate the LEDs in the lamp, luminaire, or retrofit kit. Not all DC/PoE lamps, luminaires or retrofit kits require a DC-to-DC driver.

Default: Default values (e.g., default wattage, default output, etc.) occur at the luminaire’s default setting, at which the product is shipped with no adjustments.

Default Light Output/Default Setting: The setting at which the product emerges from production and is shipped with no adjustments to lumen output.

Device Monitoring/Remote Diagnostics: The capability to monitor, diagnose, and report operational performance including system and/or component failures.

Digital Signature: During the application process, manufacturers will be required to digitally sign an agreement confirming that the safety documentation they are providing with the application covers ALL models they wish to be listed on the QPL and that the products being sold will bear the proper markings from the safety organization.

Dimmable: A product that (a) includes a dimmable driver and/or is capable of being dimmed by an external control signal, and (b) is identified as dimmable on the product specification sheet.

Dimming and Control Method Designations to the Product: Manufacturer reported communication methods available between the product and other devices for the purpose of dimming or other lighting control functions.

Dimming Capability: The ability of a product to dim or vary its light output in discrete steps or continuously.

Dimming Performance: A broad characterization of a product’s dimming capabilities as they relate to occupant acceptance. Dimming Performance can encompass the minimum dim level, the number of dimming steps, the absence of flicker while dimmed, and the maintenance of color throughout the dimming range. For LUNA, Dimming Performance refers to the minimum dim level.

Dimming Range: Expresses how low the driver or ballast can dim the connected light source.

Direct Current (DC): SSL lamps, luminaires, and retrofit kits that are powered by a DC voltage.

Direct Linear Ambient Luminaires: Suspended- or surface-mounted luminaires or recessed luminaires, no wider than 12″, designed to provide direct lighting in indoor spaces. Products may be designed to be installed end-to-end to create long chains, and may be described as direct, indirect, semi-direct, semi-indirect, or general ambient, depending on intended lighting distribution. Utilitarian “strip” style fixtures are also eligible under this category. Products intended for cove lighting are not currently eligible under this category.

Discomfort Glare: Glare that produces discomfort. It does not necessarily interfere with visual performance or visibility. Discomfort glare is a sensation of annoyance or pain caused by high luminance in the field of view. Four factors are known to participate in the perception of discomfort glare: luminance of the glare source, size of the glare source, position of the source in the field of view, luminance of the background.

Display Case Luminaires: Strip lights. Usually mounted horizontally at frame edges of glass case. Replacement lamps such as MR16 or PAR 38 lamps are not eligible.

DMX: Lighting control protocol initially created for use in theatrical applications but is in common use in architectural lighting applications where color changing or tuning effects are desired. It describes a method of digital data transmission between a controller and a dimmer or relay panel, or to DMX512-compatible luminaires. Wiring is Class 2 and is required to be a daisy-chain configuration.

Dual Mode Internal Driver (UL Type A or B): Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category operate utilizing the existing fluorescent ballast and also have the ability to operate utilizing line voltage if the fixture is rewired to bypass the ballast. These products connect to the fixture using standard pin-base connections to the lamp holders. Note that due to testing considerations, at this time only products that operate utilizing specific ballast types are eligible. Please see the Testing Requirements for more detail. Replacement lamps designed to operate utilizing magnetic ballasts, or other types of electronic ballasts not specified, are not eligible at this time. Also note that products claiming to replace T12 lamps are not eligible under Dual-Mode primary use designations. Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

Dual Mode Lamps: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category operate utilizing the existing fluorescent ballast and also have the ability to operate utilizing line voltage if the fixture is rewired to bypass the ballast. These products connect to the fixture using standard pin-base connections to the lamp holders. Note that due to testing considerations, at this time only products that operate utilizing specific ballast types are eligible. Please see the Testing Requirements for more detail. Replacement lamps designed to operate utilizing magnetic ballasts, or other types of electronic ballasts not specified, are not eligible at this time. Also note that products claiming to replace T12 lamps are not eligible under Dual-Mode primary use designations. Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

D_uv: A signed measure of the distance from the blackbody locus in the CIE 1960 (u, v) color space. A positive D_uv indicates that the chromaticity of the light is above the blackbody locus (on the green side). A negative D_uv means the chromaticity is below the blackbody locus (on the blue/pink/purple side).

Dynamically Configurable: Having no defined configuration or set of configurations and whose form factor may vary in the grow facility.

E

Ease of Implementation: The NLC QPL will identify the most typical responsible party and their required level of training to start-up and configure the system to the extent that all required capabilities are functioning. Documentation is not required.

Edge Devices: Edge devices include luminaires, switches, standalone sensors, shades, plug load controllers, etc.

Effective Date: The date upon which a new, updated, or revised technical requirement applies to all products seeking DLC qualification.

Efficacy Allowances: A permitted reduction in the efficacy threshold, specified in percentage terms, permissible where certain product attributes apply. Example: an efficacy allowance of -5% is permissible for products that have a correlated color temperature (CCT) rating of 2700K or less per SSL v5.1.

Electromagnetic Radiation: Waves of the electromagnetic (EM) field, which propagate through space and carry electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visible) light, ultraviolet, X-rays, and gamma rays. All of these waves form part of the electromagnetic spectrum.

Emergency Lighting: Lighting designed to supply illumination essential to the safety of life and property in the event of failure of the normal supply.

Emission Area: The areas of a specified face of the luminaire from which optical radiation is emitted. Multiple emission areas per face are allowed, including rectangular and elliptical shapes. They are intended primarily for use in CIE Unified Glare Rating (UGR) and similar glare calculations.

Energy Monitoring: The capability of a system to report the energy consumption of a luminaire/lamp. This capability may support performance-based efficiency rebates, real-time energy dashboards, and predictive maintenance.

Enhanced Discomfort Glare Control: A distinction available for SSL products that achieve glare control, in terms of unified glare rating (UGR), beyond a specified threshold. Products that meet the criteria are eligible for an Efficacy Allowance.

External Systems Integration: The capability to exchange data with other networked systems such as building or energy management systems (BMS/EMS), heating ventilation and air conditioning (HVAC) systems, or other lighting and building systems via BACnet, Modbus, LonWorks or other open protocols, application program interface (API) or other methods. In order to claim this “Reported” capability, the data available from the NLC for exchange with other networked systems must include occupancy status at the zone, space, or area level and energy data at the zone-, circuit- or system-level. The data the NLC can receive and interpret from other networked systems must be digital, that can be used for purposes such as scene control, zones, groups, areas, regions, and/or presets. The method, including formats and languages, by which the system
implements this capability must be clearly described in the publicly available reference(s).

Externally Supplied Actively Cooled Fixtures: The DLC defines externally supplied circulating-liquid-cooled horticultural fixtures to be products in which liquid, often water or a water/glycol solution, flows through input and output ports of each fixture in the system, being channeled through a cooling plate or other heat exchanger within the fixture.

F

Family: See Level 2 Application

Field Adjustable Light Distribution (FALD): A dimming type where products are capable of being adjusted to decrease or increase lumen output and wattage from the default setting. The default setting is defined as the setting at which the product emerges from production and is shipped with no adjustments to lumen output. The field-adjustable set point is fixed by the manufacturer, distributor, installer, or commissioning agent before or during installation or commissioning, via a control that is made discrete to that purpose via a proprietary process or separate control (i.e., not part of a regular occupant- or sensor-facing control system). Typically, the field-adjustable light output settings are not intended to be occupant interfacing. Aimable products, such as flood lights, are considered to have field adjustable distribution. Area and roadway lights that allow adjustments of up to 10 degrees may choose to identify as FALD the QPL or not, per the discretion of the manufacturer.

Field Adjustable Light Output (FALO): A dimming type where products are capable of being adjusted by the installer to decrease or increase lumen output and wattage from the default setting. The default setting is defined as the setting at which the product emerges from production and is shipped with no adjustments to lumen output. The field-adjustable set point is fixed by the manufacturer, distributor, installer, or commissioning agent before or during installation or commissioning, via a control dedicated to that purpose through a proprietary process or separate control (i.e., not part of a regular occupant-or sensor-facing control system). Typically, the field-adjustable light output settings are not intended to be occupant interfacing.

Field Adjustable Type: A designation used on the SSL QPL to identify products as Integral Field-Adjustable Light Distribution and/or Standard Component Field-Adjustable Light Distribution.

Field Angle: The angle between the two directions for which the intensity is 10% of the maximum intensity as measured in a plane through the nominal beam centerline.

Fixture-Level Controllability: Control capabilities that are integrated within or inherent to the luminaire.

Flow Rate: The rate of movement of the liquid coolant within an externally-supplied actively-cooled luminaire. Flow rate shall be held constant across the allowable temperature range and shall be reported. LM-79 testing shall employ water as the cooling liquid at an appropriate flow rate to maintain the targeted median inlet fluid temperature (i.e., middle operating inlet fluid temperature in the allowable range) as defined by the luminaire manufacturer. Flow rate, measured in gallons per minute (GPM).

Four Pin-Base Replacement Lamps for CFLs: G24q- and GX24q-base LED lamps, and 2G11 base lamps greater than or equal to twenty inches, designed to replace compact fluorescent lamps (CFLs). At this time, G24q/GX24q and 2G11 UL Type A lamps (designed to operate utilizing the existing CFL ballast), and 2G11 UL Type B (designed to operate utilizing direct line voltage), 2G11 UL Type C (designed to operate utilizing a non-integral driver), and 2G11 UL dual mode (designed to operate utilizing the existing CFL ballast or direct line voltage) are all eligible. G24q or GX24q UL Type B lamps and UL Type C lamps, as well as products with other bases (including 2-pin products), are not eligible. At this time, only products that can operate utilizing specific ballast types are eligible. Please see the Testing Requirements for more detail. Replacement lamps designed to operate utilizing magnetic ballasts, or other types of electronic ballasts not specified, are not eligible at this time.

Fuel Pump Canopy Luminaires: Ceiling-mounted luminaires for use outdoors or in locations open to elements in gas station canopies.

G

General Application: A grouping of SSL products, as a subset of Category, by more narrow application types. Examples include troffer, high-bay, and outdoor high output.

Glare Evaluation Reference Condition: Room dimension: X = 4H, Y = 8H; spacing to height ratio: 1; reflectance: 70/50/20%.

Goniophotometric Testing: Photometric performance testing using a goniophotometer. According to IES, a goniophotometer is “A photometer for measuring the directional light distribution characteristics of sources, luminaires, media, and surfaces.”

H

High End Trim: The capability to set the maximum light output to a less-than-maximum state of an individual or group of luminaires/lamps at the time of installation or commissioning. High-end trim must be field reconfigurable. This capability is distinct from automatic compensation for lumen depreciation, which automatically increases output as a system operates over time. *While the DLC specifically requires “High-end trim”, some manufacturers refer to this capability as “task tuning” or “tuning” within their system interfaces. Refer to NEMA LSD 64-2014 for definitions of lighting controls terminology.

High Output (Outdoor): A General Application category for outdoor luminaires and outdoor retrofit kits in which the product’s light output is greater than or equal (≥) to 10,000 lumens and less than (˂) 30,000 lumens.

High-Bay: Pendant, recessed, or surface-mounted fixtures specific for indoor high ceiling spaces (intended for ceilings ≥25′). See High-Bay Luminaires (Commercial and Industrial)

High-Bay Aisle Luminaires: Pendant or surface-mounted fixtures specific for indoor high ceiling spaces (intended for ceilings ≥25′), in locations that require lighting of aisles.

High-Bay Luminaires (Commercial and Industrial): Pendant, recessed, or surface-mounted fixtures specific for indoor high ceiling spaces (intended for ceilings ≥25′).

High-Bay Retrofit Kit: Integrated-style kits that replace all reflectors and optical systems of existing luminaires. Not screw-in “lamps” intended as HID replacements.

Horizontal Angle: Measurements in degrees of angular displacement measured counterclockwise in a horizontal plane for Type C photometry and clockwise for Type A and B photometry.

Horizontal Refrigerated Case Luminaires: Strip lights in refrigerator cases, horizontally mounted along refrigerator case shelves or canopies. Category covers only complete luminaires, with all necessary components. Replacement lamps are not currently eligible under this category.

I

Independent Test Report (ITR): A singular test report published by an approved testing laboratory. Independent Test Reports include full LM-79/color reports, LED ISTMT, and Driver ISTMT report types.

Individual Addressability: The ability to communicate digitally and uniquely with each individual luminaire/lamp, sensor, controller, and user interface device in the lighting system, allowing for software-controlled configuration and re-configuration of devices and control zones independent of electrical circuiting.

Inlet Fluid Temperature Range: The minimum and maximum allowable operating inlet fluid temperatures of an externally supplied actively cooled fixture.’

Input Power Type: Designation of alternating current (AC) or direct current (DC) power. Power over Ethernet (PoE) is directly specified in applications as a Power Type, as a subtype of DC power.

In-Situ Temperature Measurement Testing (ISTMT): The measurement of the LED source case temperature within the LED system (luminaire or lamp) while it is operating in its designed position and or environment. The measurement is performed at the temperature measurement point (Tc Point) indicated by the LED package manufacturer.

Integral Controls: Sensing and/or control of light output directly integrated or embedded into the lamp or luminaire and available as an option within the lamp or luminaire product model number.

Integral Field Adjustable Light Distribution: Products where the distribution can be adjusted by electrical or mechanical means without the addition, removal, or replacement of any parts or accessories. The adjustment must be integral to the product. For example, a luminaire with rotatable light bars to aim the light at different angles would fall under this category.

Integral Sensor Receptacle: An integrated receptacle that can accept a variety of sensors, communication hardware, and/or other control devices for indoor or outdoor lighting equipment.

Integrated Retrofit Kits: Retrofit systems which replace the entire optical systems of the existing luminaire and fully integrate a replacement light source, optics, and reflective panel, where the panel connects with the fixture housing front along two opposing sides or more and when installed, fully conceals the interior of the existing housing. These retrofit kits may not employ existing lamp holders or “pin” bases, and retrofit kits that have exposed LEDs, tube style lenses, or bar-style components are not eligible.

Integrated Retrofit Kits for 1×4 Luminaires: Retrofit systems which replace the entire optical systems of the existing luminaire and fully integrate a replacement light source, optics, and reflective panel, where the panel connects with the fixture housing front along two opposing sides or more and when installed, fully conceals the interior of the existing housing. These retrofit kits may not employ existing lamp holders or “pin” bases, and retrofit kits that have exposed LEDs, tube style lenses, or bar-style components are not eligible.

Integrated Retrofit Kits for 2×2 Luminaires: Retrofit systems which replace the entire optical systems of the existing luminaire and fully integrate a replacement light source, optics, and reflective panel, where the panel connects with the fixture housing front along two opposing sides or more and when installed, fully conceals the interior of the existing housing. These retrofit kits may not employ existing lamp holders or “pin” bases, and retrofit kits that have exposed LEDs, tube style lenses, or bar-style components are not eligible.

Integrated Retrofit Kits for 2×4 Luminaires: Retrofit systems which replace the entire optical systems of the existing luminaire and fully integrate a replacement light source, optics, and reflective panel, where the panel connects with the fixture housing front along two opposing sides or more and when installed, fully conceals the interior of the existing housing. These retrofit kits may not employ existing lamp holders or “pin” bases, and retrofit kits that have exposed LEDs, tube style lenses, or bar-style components are not eligible.

Intended Use Case: The application or environment in which a product will be installed or utilized. For Horticultural products, intended use applications include indoor (single tier, multi-tier) and greenhouse.

Intensity Scaling: The uniform scaling of reported intensity data with respect to the laboratory measurements.

Interior Directional: A General Application category consisting of Track or Mono-Point Directional Luminaires and Wall-Wash Luminaires.

Internal Driver/Line Voltage (UL Type B) Lamps: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category employ lamp holders to connect to the fixture being retrofitted, but do not operate utilizing the existing fluorescent ballast. These products require rewiring of the existing fixture to bypass the ballast and send line voltage directly to the lamp holders. (See Testing and Reporting Requirements for Linear Replacement Lamps for more detail on testing requirements.) Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

Interoperability: The ability of systems or system components to transmit, receive, interpret, and/or react to data and/or power and function in a defined manner.

Intra-Canopy: Lighting products designed to be placed within the structure of the plant canopy. As opposed to top-lighting products placed above the canopy and designed to shine on the top of the plants only.

L

Lamp Category: A designation for ANSI standard screw- and pin-base replacement products. Current categories include Linear Replacement Lamps; Screw-Base Replacements for HID Lamps; and Four Pin-Base Replacement Lamps for CFLs.

Lamp Holder: A device which mechanically supports and provides an electrical connection for a lamp.

Landscape/Accent Flood and Spot Luminaires: Small, low-lumen, directional luminaires intended to highlight objects and areas in outdoor lighting. Manufacturers must follow NEMA guidelines for declaring beam spread.

LED Lamp (integrated): An integrated assembly composed of light emitting diode (LED) packages (components) or LED arrays (modules), as well as an LED driver, an ANSI standard base, and other optical, thermal, mechanical and electrical components. The device is intended to connect directly to the branch circuit through a corresponding ANSI standard lamp-holder (socket).

LED Lamp (non-integrated): An assembly composed of a light emitting diode (LED) array (module) or LED packages (components), and an ANSI standard base. The device is intended to connect to the LED driver of an LED luminaire through an ANSI standard lamp-holder (socket). The device cannot be connected directly to the branch circuit.

LED Package: A combination of one or more LED chips with mechanical supports, optical elements, electrical connections and thermal conduction paths.

Level 1 Application: A product application for a product or group of products which meet the Level 1 eligibility criteria. See SSL and LUNA Level 1 Applications for more information.

Level 2 Application: A product application for a group of products which meet the Level 2 eligibility criteria. See SSL and LUNA Level 2 Applications for more information.

Light Pollution: The combination of all the adverse or obtrusive effects of electric light that produces artificial sky glow, including: unnecessary, unwanted, or wasted light; light that damages or degrades the nighttime environment; and light that negatively impacts humans and other species.

Light Trespass: The encroachment of light, typically across property boundaries, causing annoyance, loss of privacy, or another nuisance. Also called spill light or obtrusive light.

Lighting Scheme: Lighting schemes provide insight into how listed horticultural lighting fixtures are intended to deliver optical radiation to the crop/canopy in terms of both direction and duration.

Line Voltage Control: Also called powerline communication or phase-control dimming. When used for control, line-voltage wiring provides a path for both power and control signals.

Linear Ambient: Suspended- or surface-mounted luminaires or recessed luminaires, no wider than 12″, designed to provide direct lighting in indoor spaces. Products may be designed to be installed end-to-end to create long chains, and may be described as direct, indirect, semi-direct, semi-indirect, or general ambient, depending on intended lighting distribution. Utilitarian “strip” style fixtures are also eligible under this category. Products intended for cove lighting are not currently eligible under this category.

Linear Ambient Luminaires w/ Indirect Component: Suspended-mounted luminaires or recessed luminaires, no wider than 12″, designed to provide ambient lighting in indoor spaces, including an intentional lighting component that is indirect. Products may be designed to be installed end-to-end to create long chains, and may be described as indirect, semi-direct, semi-indirect, direct-indirect, indirect-direct, or general ambient, depending on intended lighting distribution. Utilitarian “strip” style fixtures are not eligible under this category. Products intended for cove lighting are not currently eligible under this category.

Linear Ambient Retrofit Kit: Retrofit kits for “strip” luminaires and other types of linear ambient luminaires. Do not employ existing lamp holders or “pin” bases.

Linear Retrofit Kits for 1×4 Luminaires: Tube-shaped or strip-style retrofit kits for troffers. Products in this category do not replace the optical systems of the existing luminaire and leave the basic form of the existing luminaire intact or exposed. These retrofit kits may not employ existing lamp holders or “pin” bases.

Linear Retrofit Kits for 2×2 Luminaires: Tube-shaped or strip-style retrofit kits for troffers. Products in this category do not replace the optical systems of the existing luminaire and leave the basic form of the existing luminaire intact or exposed. These retrofit kits may not employ existing lamp holders or “pin” bases.

Linear Retrofit Kits for 2×4 Luminaires: Tube-shaped or strip-style retrofit kits for troffers. Products in this category do not replace the optical systems of the existing luminaire and leave the basic form of the existing luminaire intact or exposed. These retrofit kits may not employ existing lamp holders or “pin” bases.

Load Shedding/Demand Response: The capability to reduce the energy consumption of a lighting system, in a pre-defined way, on a temporary basis, in response to a demand response signal without manual intervention. The method by which the system implements this capability (managed by NLC and/or BMS) must be clearly described in the publicly available reference(s). The method for pre-defining the system behavior for temporary load reduction must be accessible through a user interface. The data the NLC can receive and interpret from other networked systems must include at least a signal that can be used for purposes such as LS/DR.

Loading Condition: A configuration of loads connected to a power supply or driver.

Loading Percentage: The ratio of tested DC output power to maximum output power with this fixture.

Low Output (Outdoor): A General Application category for outdoor luminaires and outdoor retrofit kits in which the product’s light output is greater than or equal to (≥) 250 lumens and less than (˂) 5,000 lumens.

Low Voltage Control: Provides a dedicated pathway for control signals, which manifest as variations in voltage. Because this type of wiring is not limited to conduit, it is flexible.

Low-Bay: Pendant, recessed, or surface-mounted fixtures specific for indoor ceiling spaces (intended for <25′). See Low-Bay Luminaires (Commercial and Industrial)

Low-Bay Luminaires (Commercial and Industrial): Pendant, recessed, or surface-mounted fixtures specific for indoor ceiling spaces (intended for <25′).

Low-Bay Retrofit Kit: Integrated-style kits that replace all reflectors and optical systems of existing luminaires. Not screw-in “lamps” intended as HID replacements.

Lumen Maintenance: The elapsed operating time over which an LED light source maintains a given percentage of its initial light output.

Luminaire Level Lighting Control (LLLC): The capability to have a networked occupancy sensor, ambient light sensor, and high-end trim installed for each luminaire/kit/lamp, and directly integrated or embedded into the form factor during the manufacturing process.

Luminaire Specific Housing: If a retrofit kit is designed for a specific housing that is not represented by the approved housings listed above, and does not meet the conditions of the pre-approved equivalent process, manufacturers may select a different housing that is appropriate and representative of the housing the retrofit kit would be installed in the field.

Luminous Dimensions: Refers to the luminous (that is, light emitting) opening of the luminaire, not its physical dimensions. They are meant to approximate the luminous opening (either as a luminous area or luminous volume) for lighting calculations. It is assumed that there is only one luminous opening in each IESNA LM-63-2002 data file. DLC SSL Technical Requirements Version 5.1 luminaires may have more than one luminous opening, and regardless of the number of luminous openings, the width, length and height fields in the .ies file must use one of the luminous shapes available in IES LM-63 to describe the smallest geometry that completely encompasses all of the light emitting surfaces of the product.

Luminous Flux: The time rate of flow of radiant energy, evaluated in terms of a standardized visual response. Unless otherwise indicated, the luminous flux is defined for photopic vision. For scotopic vision, the corresponding spectral luminous efficiency function, V'(λ), and the corresponding maximum spectral luminous efficacy, K’m, are substituted in the above equation. Km and K’m are derived from the basic SI definition of luminous intensity and have the values 683 lm/W and 1,700 lm/W, respectively.

Luminous Intensity Distribution: A curve, often polar, that represents the variation in luminous intensity of a lamp or luminaire in a plane passing through the light center. Note: A vertical candlepower distribution curve is obtained by taking measurements at various angles of elevation about a source in a vertical plane through the light center; unless the plane is specified, the vertical curve is assumed to represent an average such as would be obtained by rotating the lamp or luminaire about its vertical axis. A horizontal intensity distribution curve represents measurements made at various angles of azimuth in a horizontal plane through the light center.

Luminous Shape: The physical dimensions of the luminous opening or luminous emitter, as described within ANSI/IES LM-63-19.

M

Manual Dimming (for horticultural applications): The ability to vary the light output of a fixture using a knob or other control device integrated into the fixture.

Manual Dimming (for non-horticultural applications): The ability to vary the light output of a fixture or group of fixtures via a wall control or other mechanism accessible to the occupant.

Marketing Materials: Physical or digital media which are used to advertise and promote a product’s capabilities, attributes, available options, performance, operation characteristics, and/or installation instructions.

Maximum Output Power: The power required to provide 100% of rated light output.

Maximum Power Load: The load representing the maximum number of light fixtures that can be powered by this power source.

Mid Output (Outdoor): A General Application category for outdoor luminaires and outdoor retrofit kits in which the product’s light output is greater than or equal (≥) to 5,000 lumens and less than (˂) 10,000 lumens.

Midstream Programs: A utility midstream program provides customer incentives at the point of purchase, typically at a wholesale equipment distributor, for highly efficient products.

Modular Product: Products sold as systems with multiple units attached to a power supply.

Mogul Screw-Base (E39/E40) Replacement for HID Lamps: LED replacement lamps for HID lamps which require the existing HID ballast to be bypassed and the lamp holder to be wired with line voltage, used in outdoor pole/arm-mounted area and roadway luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Multifunction Sensor: A combination sensor that two or more relevant sensor capabilities listed in SSL 5.1 Table 8. Examples include occupancy + daylight, occupancy + photocell, or traffic + photocell.

Multiple Listing Correlation Sheet: All products are required to submit a Multiple Listing correlation sheet issued by the approved safety organization which cross-references the OEM model numbers with private label model numbers.

Multi-tier: Multi-tier indoor controlled environments are typically synonymous with vertical farms, and products listed in this controlled environment should be intended for crops that have a short stature, short production cycle, and high yield. Products intended for multi-tier layer indoor controlled environments are often highly customizable and scalable.

N

Narrow-Band Amber: Generates light via direct emission with a peak emission near 590 nm. Phosphor conversion is not used. These LEDs have a significantly narrower spectrum than phosphor converted amber LEDs and have a more saturated color.

Narrow-Band Light: Light with an extremely narrow spectrum and highly saturated color at a specific wavelength, such as light from a direct emission LED or low-pressure sodium emitter.

NEMA 5-Pin: The 5-position receptacle has three line-voltage power contacts plus two dimming/signal contacts.

NEMA 7-Pin: The 7-position receptacle has three line-voltage power contacts plus four dimming/signal contacts. The 7-pin configuration supports field upgrades of the control capabilities of LED luminaires by adding or changing wirelessly networked controllers with sensing and communication abilities.

Networked Replacement Lamp: A linear, mogul screw-base, or four pin-base replacement lamp that includes all the following controllability features built into the lamp: continuous dimming; wireless communication; high-end trim; and individual addressability. Some networked replacement lamps may also incorporate integrated sensors such as occupancy/vacancy sensing.

Networking of Luminaires and Devices: The capability of individual luminaires/lamps and control devices to exchange digital data with other luminaires/lamps and control devices on the system. This capability is required at the room, space, or area level, but not at the whole building level or beyond (e.g., non-lighting systems, or the internet).

Nominal Input Voltage Range: The input voltage range described on the product specification sheet and other product documentation.

O

Occupancy Sensing: A lighting control strategy that regulates the operation of lighting or other equipment based upon detecting the presence or absence of people within a space.

Occupancy Sensor: A control device that detects occupant presence and automatically turns luminaires and/or other equipment on and, after a preset delay during which no presence is detected, turns them off. Also called a motion detector.

Omni-Directional: A product that emits radiation in all directions except in the base direction.

Operating Input Voltage Range: The voltage range at which the product functions at full light output as defined in the testing section below. This may be narrower than the Nominal input voltage range in the product documentation: for example, a product described in literature as operating between 25V and 29V may, more precisely, operate between 26.1V and 28.4V.

Optional Components: Products where the distribution is adjusted by adding parts that do not come standard with every order.

Other Wired Communication: Other wired communication protocol as specified by the manufacturer.

Other Wireless Communication: Other wireless communication protocol as specified by the manufacturer.

Outdoor Full-Cutoff Wall-Mounted Area Luminaires: Typically, walkway or security lights affixed to building wall. May be box shaped. These products produce no uplight.

Outdoor Non-Cutoff and Semi-Cutoff Wall-Mounted Area Luminaires: Typically, walkway or security lights affixed to building wall. Commonly known as “wall packs” and may be box shaped. The products produce a non-negligible amount of uplight. Products in this group are meant to be fixed in place and provide general illumination, not directional light.

Outdoor Pole/Arm-Mounted Area and Roadway Luminaires: Typical streetlights, parking lot lights. May be cobra-head shaped, shoebox, etc.

Outdoor Pole/Arm-Mounted Decorative Luminaires: Commonly, in-town streetlights or historical reproductions, may be acorn-shaped, post-top, lantern, teardrop etc. These fixtures offer a stylish or decorative element that is clear in the luminaire design.

Output Power: The maximum designed power supply provided by a driver.

P

Parent Product: Products for which test data including lumen output, efficacy, UGR (if applicable), BUG rating (if applicable) is listed on the QPL. Note that these products have both tested and reported data.

Parking Garage Luminaires: Ceiling-mounted luminaires for use outdoors or in locations open to elements in multi-deck garages.

Performance-Affecting Mounting Options: Mounts that increase uplight the most or reflect light in any unintended direction.

Personal Control: A lighting control strategy that enables users to adjust their illuminated environment to their personal preference within their workspace.

Phase-Cut: Modification, or cutting, of the leading or trailing edge of the AC mains sinusoidal waveform to produce varying light output.

Phosphor-Converted Amber: Similar to typical commercially available white LEDs, pc-Amber LEDs are sometimes referred to with nominal CCT designations below 2200K—such as “1600K” or “1700K”— though these sources typically have chromaticity coordinates that are located closer to the spectrum locus than to the Planckian locus (Figure 5), making them highly saturated.

Phosphor-Converted White: By incorporating the phosphor in the body of a blue LED with a peak wavelength around 450 to 470 nanometers, some of the blue light will be converted to yellow light by the phosphor. The remaining blue light, when mixed with the yellow light, results in white light.

Photosynthetically Active Radiation (PAR): Photosynthetically active radiation designates the spectral range (waveband) of radiation, from 400 to 700 nm, which by definition photosynthetic organisms are able to use in the process of photosynthesis. The measured result of PAR can be reported as PPF or PPFD.

Photocell: A sensor that can automatically affect the operation of lighting or other equipment based on the amount of daylight and/or ambient light that is present in an exterior environment.

Photometric: The measurement of properties of light such as luminance, luminous intensity, or luminous flux.

Photometric Toolbox: Photometric Toolbox provides photometric software tools to create, edit, evaluate and report photometric files. Each tool in the toolbox provides separate functionality – e.g., the Open tool opens photometric files, the Viewing tool allows you to view the photometric web, etc.

Photomorphological Effects: Any change in the morphology (shape) or composition (e.g., flowering induction, secondary metabolite production) of a plant or plant part that occurs in response to exposure to electromagnetic radiation.

Photon Flux: Photon flux, also commonly referred to as quantum flux, is the rate of flow of photons.

Photon Flux Maintenance (PFM): A characterization of the ability of the device to maintain its output within the given parameters over time.

Photosynthetic Light: Irradiance within the wavelength band 400 to 700 nm.

Photosynthetic Photon Efficacy (PPE): The photosynthetic photon flux divided by input electric power. The unit is micromoles per second per electric watt (μmol × s-1 × We-1), or micromoles per joule (μmol × J-1).

Photosynthetic Photon Flux (PPF): The total output of the product over the specific range of wavelengths defined by ANSI/ASABE S640 for PPF (400-700nm).

Photosynthetic Photon Intensity Distribution (PPID): The distribution of photosynthetic photon intensity per unit solid angle leaving the fixture. This distribution is measured and reported as integrated for all wavelengths across the 400-700nm range leaving the fixture and contains no spectral distribution information itself.

PIR High-Bay Height Coverage: Tested at one or more of the following mounting heights of 20ft, 30ft, 40ft, 50ft & 60ft.

Plug Load Control: The capability to control the power delivered to receptacles through scheduling or occupancy sensing. The method by which the system implements this capability must be clearly described in the publicly available reference(s).

PoE Connection: This PoE field indicates whether the product connects directly or indirectly to the PoE network; for example, whether a luminaire connects directly to the PoE network, or indirectly through another luminaire or driver that is connected to the PoE network.

PoE Type and Class: Lists the Type and Class of PoE utilized.

Power Factor (PF): The power input in watts divided by the product of the ballast/driver input voltage and ballast/driver input current (measured in amps). The power factor of an electrical system is a number between 0 and 1 representing the ratio of the real power flowing to the load to the apparent power in the circuit.

Power Over Ethernet (PoE): A specific subset of DC products that comply with the IEEE 802.3 Standards for carrying both power and communication signals on Ethernet cables.

Power Quality: The degree to which current and voltage wave forms conform to a sinusoidal shape and are in synchronous phase with each other. Poor power quality results when the wave forms are distorted and/or out of phase and can interfere with data communications, cause inefficient operation or failure of other electrical equipment on the same supply line, and result in excessive current in electrical distribution lines.

Power Source Loading Percentage: The fixture loading that creates the worst-case efficiency used in the de-rating calculations and the power source load point that creates that worst-case condition. See: Loading Percentage

Pre-Approved Equivalent Housing: DLC specifies typical fixture housings for the testing of retrofit products, referred to as Approved Housings. This is done to provide test results under common conditions in which the retrofit kits may be installed. In providing this list of typical fixture housings, DLC does not endorse or exclude any particular make or model frame for use in energy efficiency programs.

Premium: A designation available to SSL products that identifies products with higher verified levels of performance and light quality.

Primary Use Designation (PUD): A grouping of SSL products, as a subset of General Application, which describes how a product is intended to be used in application and is based on the description provided by the manufacturer and specification sheets for the product that convey intended uses for the product.

Process: Standards that address the development process in order to reduce the number of cybersecurity vulnerabilities that are designed into components, systems, and services, and that manifest over the product lifecycle.

Product Specification Sheet: A technical document that provides a product description (often including a product image), product characteristics, performance specifications, and ordering information for a lighting product.

Proprietary Control Signals: Protocols that are freely available or implemented only through a contract. They are normally developed by manufacturers or individuals, and therefore are not developed in an open consensus method.

R

Rayleigh Scatter: The dispersion of electromagnetic radiation by particles much smaller than the wavelength of the radiation. The amount of scatter varies inversely as the fourth power of the wavelength, resulting in short wavelengths being scattered far more than longer wavelengths.

Receptacle (ANSI C136.41-2013): The mechanical and electrical interface between an outdoor luminaire and a photocell, typically mounted on top of the luminaire. The dimensions of the receptacle are roughly 1.5” high x 2.5” diameter. The 5-pin version has three line-voltage power contacts plus two dimming/signal contacts. The 7-pin version has three line-voltage power contacts plus four dimming/signal contacts. The 7-pin configuration supports field upgrades of the control capabilities of LED luminaires by adding or changing wirelessly networked controllers with sensing and communication abilities. The data interface protocol used by the dimming/signal contacts is not defined.

Receptacle (ANSI C136.58-2019 (Zhaga Book 18)): The mechanical and electrical interface between an outdoor LED luminaire and modules for sensing and communication. The data interface is defined by the digital D4i/ANSI C137.4 The specification supports field upgrades of the control capabilities of LED fixtures by adding or changing 24V modules that provide sensing and communication abilities. The dimensions are roughly 1.1” high x 1.5” diameter.

Relative Photometry: Consists of the evaluation of the photometric characteristic of a light source or luminaire by comparison with the assumed lumen or spectral output of a bare test light source. Measured candela values are scaled according to the ratio of the measured bare light source lumens to the light source manufacturer’s rated light source lumens.

Replacement Lamps (“Plug and Play”) (UL Type A): Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this primary use designation employ lamp holders to connect to the fixture being retrofitted and are designed to be “plug and play” replacements for fluorescent lamps. That is, products in this category operate utilizing an existing fluorescent ballast, and do not require mechanical or electrical changes to the fixture. Note that due to testing considerations, at this time only products that operate utilizing specific ballast types are eligible. Replacement lamps designed to operate utilizing magnetic ballasts or other types of electronic ballasts not specified are not eligible at this time. Also note that products claiming to replace T12 lamps are not eligible under Type-A primary use designations. Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

Replacement Lamps for Fuel Pump Canopy Luminaires (UL Type B): LED replacement lamps for HID lamps which require the existing HID ballast to be bypassed and the lamp holder to be wired with line voltage, used in fuel pump canopy luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Fuel Pump Canopy Luminaires (UL Type C): LED replacement lamps for HID lamps which require the existing HID ballast to be replaced with an external LED driver (the lamp holder is not wired with line voltage), used in fuel pump canopy luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for High-Bay Luminaires (UL Type B): LED replacement lamps for HID lamps which require the existing HID ballast to be bypassed and the lamp holder to be wired with line voltage, used in high-bay luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for High-Bay Luminaires (UL Type C): LED replacement lamps for HID lamps which require the existing HID ballast to be replaced with an external LED driver (the lamp holder is not wired with line voltage), used in high-bay luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Low-Bay Luminaires (UL Type B): LED replacement lamps for HID lamps which require the existing HID ballast to be bypassed and the lamp holder to be wired with line voltage, used in low-bay luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Low-Bay Luminaires (UL Type C): LED replacement lamps for HID lamps which require the existing HID ballast to be replaced with an external LED driver (the lamp holder is not wired with line voltage), used in low-bay luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Outdoor Full-Cutoff Wall-Mounted Area Luminaires (UL Type B): LED replacement lamps for HID lamps which require the existing HID ballast to be bypassed and the lamp holder to be wired with line voltage, used in outdoor wall-mounted area luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Outdoor Full-Cutoff Wall-Mounted Area Luminaires (UL Type C): LED replacement lamps for HID lamps which require the existing HID ballast to be replaced with an external LED driver (the lamp holder is not wired with line voltage), used in outdoor wall-mounted area luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Outdoor Pole/Arm-Mounted Area and Roadway Luminaires (UL Type B): LED replacement lamps for HID lamps which require the existing HID ballast to be bypassed and the lamp holder to be wired with line voltage, used in outdoor pole/arm-mounted area and roadway luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Outdoor Pole/Arm-Mounted Area and Roadway Luminaires (UL Type C): LED replacement lamps for HID lamps which require the existing HID ballast to be replaced with an external LED driver (the lamp holder is not wired with line voltage), used in outdoor pole/arm-mounted area and roadway luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Outdoor Pole/Arm-Mounted Decorative Luminaires (UL Type B): LED replacement lamps for HID lamps which require the existing HID ballast to be bypassed and the lamp holder to be wired with line voltage, used in outdoor decorative luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Outdoor Pole/Arm-Mounted Decorative Luminaires (UL Type C): LED replacement lamps for HID lamps which require the existing HID ballast to be replaced with an external LED driver (the lamp holder is not wired with line voltage), used in outdoor decorative luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Parking Garage Luminaires (UL Type B): LED replacement lamps for HID lamps which require the existing HID ballast to be bypassed and the lamp holder to be wired with line voltage, used in parking garage luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Replacement Lamps for Parking Garage Luminaires (UL Type C): LED replacement lamps for HID lamps which require the existing HID ballast to be replaced with an external LED driver (the lamp holder is not wired with line voltage), used in parking garage luminaires. Only mogul-base (E39 and E40) products are eligible. Lamps are only considered qualified in the end-uses they are listed in.

Retrofit Kits for Direct Linear Ambient Luminaires: Retrofit kits for “strip” luminaires and other types of linear ambient luminaires. Do not employ existing lamp holders or “pin” bases.

Retrofit Kits for Fuel Pump Canopy Luminaires: Integrated-style kits that replace all reflectors and optical systems of existing luminaires. Not screw-in “lamps” intended as HID replacements.

Retrofit Kits for High-Bay Luminaires (Commercial and Industrial): Integrated-style kits that replace all reflectors and optical systems of existing luminaires. Not screw-in “lamps” intended as HID replacements.

Retrofit Kits for Large Outdoor Pole/Arm-Mounted Area and Roadway Luminaires: Integrated-style kits that replace all reflectors and optical systems of existing luminaires. Not screw-in “lamps” intended as HID replacements.

Retrofit Kits for Low-Bay Luminaires (Commercial and Industrial): Integrated-style kits that replace all reflectors and optical systems of existing luminaires. Not screw-in “lamps” intended as HID replacements.

Retrofit Kits for Outdoor Full-Cutoff Wall-Mounted Area Luminaires: Integrated-style kits that replace all reflectors and optical systems of existing luminaires. Not screw-in “lamps” intended as HID replacements.

Retrofit Kits for Outdoor Pole/Arm-Mounted Area and Roadway Luminaires: Integrated-style kits that replace all reflectors and optical systems of existing luminaires. Not screw-in “lamps” intended as HID replacements.

Retrofit Kits for Outdoor Pole/Arm-Mounted Decorative Luminaires: Integrated-style kits that replace all reflectors and optical systems of existing luminaires. Not screw-in “lamps” intended as HID replacements.

Retrofit Kits for Parking Garage Luminaires: Integrated-style kits that replace all reflectors and optical systems of existing luminaires. Not screw-in “lamps” intended as HID replacements.

S

Safety Certification Document: All products are required to submit a compliance certificate from an approved safety certification organization relevant in the United States or Canada. This compliance document shall bear the manufacturers name and will be proof that the products listed have been investigated by the safety organization and found to be in compliance with the standards listed on the certificate. The name of this document varies by safety  organization, however, is commonly referred to as a Certificate of Compliance or Authorization to Mark. See Certificate of Compliance

Scaled Photometry: Photometric data that has been scaled from the original measurement. The magnitude of this scaling is represented by a scale factor.

Scanning Resolution: For products tested with a goniophotometer, angular scanning resolution defines the increment between vertical and horizontal angles scanned.

Scene Control: The capability of a system to provide two or more pre-programmed light level settings for a group or multiple groups of luminaires to suit multiple activities in a space, and allow for recall of these settings via a switch, control device, or signal from a BMS or API.

Scheduling: A control strategy that controls lighting, equipment, or systems based on time of day or astronomical event. For example, scheduling building lighting to be automatically turned off at 6 p.m. or at sunset.

Self-Protect Cut-Off Functionality: Fail to off functionality used to turn off the actively cooled fixture before a maximum inlet fluid temperature is reached, in the event that the external cooling system fails.

Shield: Shields are used to minimize light trespass onto adjacent areas. A shield is an internal or external opaque structure that obstructs the backward, forward, or side light distribution in a specific solid angle produced by the shield angle and azimuth. A house-side-shield (HSS) prevents some amount of high angle light from spilling backward behind the luminaire. A front-side-shield (FSS) prevents some amount of high angle light from being emitted towards the street-side. A cul-de-sac-shield (CSS) prevents some amount of high angle light from spilling backwards and sideways. Other shield types may be offered by manufacturers – such as left-side-shields (LSS) and right-side-shields (RSS) – that do not qualify for efficacy allowances.

Shield Angle: The angle between a horizontal line through the light center and the line of sight at which the bare source first becomes visible.

Shield Type Subgroup: Shields typically reduce luminaire efficacy due to light absorption, so they may be eligible for an efficacy allowance based on distribution performance. Shield type sub-groups eligible for LUNA efficacy allowances are house-side shields (HSS), cul-de-sac shields (CSS), and front-side shields (FSS), provided that the zonal lumen differences between the shielded and unshielded version meet the requirements noted in the allowance section. Shield type subgroups cannot be combined. A HSS subgroup, for example, can only contain products with house-side shields, not cul-de-sac shields or front-side shields. Other shield types can be used to meet the requirement that a roadway/area/decorative product must have a shield option/accessory; however, they are not eligible for a shielding efficacy allowance.

Shielded Photometry: The direct measurement of a light source with a shield attached.

Similar Thermal Environment: An alternative fixture to be used for retrofit kit testing in which the internal operating temperature, volume, and construction materials are similar to that of an approved housing.

Single Product Application: See Level 1 Application

Single Tier: Single tier indoor controlled environments are indoor facilities with a single canopy, and that do not have multiple vertical layers of crops. Products listed in this category may be intended for a broader variety of crops with varying stature, production cycle, and yield.

Sky Glow: The brightening of the night sky that results from the scattering and reflection of light from the constituents of the atmosphere (gaseous molecules and aerosols), in the direction of the observer. It has two components: natural sky glow and artificial sky glow.

Sole-Source: Products reported to be sole-source shall be intended for applications where the lighting fixture is the primary source of optical radiation for inducing photobiological effects in crops

Solution Type/Concentration: The type and concentration of solution used for cooling of externally supplied actively cooled fixtures.

Spacing Criteria: A classification parameter for indoor luminaires relating to the distribution of the direct-illuminance component produced on the work plane. The spacing criterion of a luminaire is an estimated maximum ratio of the luminaire spacing to the luminaire mounting height above the work plane for a regular array of that luminaire such that the work plane illuminance will be acceptably uniform.

Specialty: ______: The “Specialty” designation has been developed as an additional tool for DLC and its Member programs to employ in seeking to identify high-quality, energy-saving LED fixtures in commercial and industrial applications for certain niche applications for which DLC has not yet developed a specific Primary Use designation. Seeking qualification of a product using this Primary Use designation is an acknowledgement of the rules of the program and a confirmation that an applicant agrees to abide by the decisions of the program. Products with a Specialty designation are not eligible for DLC Premium classification.

Spectral Power Distribution (SPD): Describes the power emanating from a light source as a function of wavelength. The information can be presented graphically or as a numerical table.

Spectral Quality: Product performance relating to color properties, including chromaticity and color rendition.

Spectral Quantum Distribution (SQD): Describes the power emanating from a light source as a function of wavelength. The information can be presented graphically or as a numerical table.

Stairwell and Passageway Luminaires: The DLC requires that products in the Stairwell and Passageway Lighting Primary Use Designation meet one of the following conditions: (1) Luminaires that include integral controls for occupancy sensing and bi-level dimming. (2) Luminaires that operate off remote occupancy sensors, including wireless options, where a remote sensor(s) is sold packaged together with a luminaire(s) under a single model number or ordering code. (3) Luminaires that operate off remote occupancy sensors, including wireless options, where the luminaire and sensor are sold separately, but the luminaire has features enabling communication with a remote sensor(s).

Standalone Sensors: Control devices designed to provide autonomous operation of a lighting load, which may be a luminaire or luminaires installed on a switch leg.

Standard Component Field Adjustable Light Distribution: Products where the distribution is adjusted by adding or removing parts that are included with the product as sold under a single model number. These interchangeable components that come as standard with a single model number are defined as “Standard Components” for this policy. An example for this type of FALD product is a luminaire that is shipped standard with three reflectors under a single model number, and for which the installer chooses one of the reflectors during the installation and stores or discards the other two reflectors.

Standard Components: The interchangeable components that come as standard with a single model number are defined as “Standard Components” for this policy.

Stepped Dimming: A lighting control strategy that varies the light output of a lighting system in one or more predetermined steps of greater than one percent of full output. The changes between levels are generally abrupt and perceptible.

Supplemental: Products reported to provide supplemental lighting shall supplement daylight, which is the primary light source. These products shall be intended for applications where the lighting product is not the primary source of optical radiation for inducing photosynthesis, but is instead intended to supplement daylight and overall energy usage is not as high (e.g., a specialty lamp that is intended to provide specific spectra to induce a specific growth action in addition to daylight in a greenhouse or a higher output product with broadband spectra to fully supplement daylight in a northern environment).

Supplemental Documentation: Marketing materials produced and/or distributed by a manufacturer which are used to provide information in addition to a product specification sheet.

Surveillance Testing: Requirements to actively monitor the validity of data and other information submitted to the QPLs to protect the integrity and value of the QPLs for all stakeholders.

System: Standards that address the networked system, including aspects such as authentication, data confidentiality, system integrity, service availability, protocol converters, firewalls, gateways, web servers, and web services interfaces.

System Capabilities: Defines capability types in NLC5 Tables 1, 1.1, 2, 2.2. Recommend defining capabilities as a whole to differentiate from terms such as a “sensors.”

T

Technical Requirements Tables (TRT): The Technical Requirements Tables are a complete set of minimum technical specifications that products must meet to be qualified on the DLC QPL. TRTs can be found on the DLC website.

Temperature Measurement Point (TMP): The probe location, as specified by the LED package manufacturer, for performing in-situ temperature measurements.

Tested Performance: Product attribute values which have been measured, as opposed to estimated, calculated, or rated, using an acceptable test methodology as described within the relevant technical requirements. Tested performance values must be documented and verifiable using a test report.

Thermocouple: Devices that measure temperature. Thermocouples consist of two wires of different metals welded together at each end. Each type is classified by its alloy combination. Since electrons in metals carry both heat and electricity, thermocouple voltage is a side effect of heat flow. Each material used as wires (thermoelements) of a thermocouple has a different emf response to a temperature gradient. Due to the Seebeck effect, where a temperature difference exists, there is also a charge imbalance. From this phenomenon, a voltage is generated, and the difference between the two emfs in each wire results in the measured emf of the thermocouple.

Tolerance: A range beyond the stated performance threshold within which product performance is considered acceptable.

Top Lighting: Products reported to be a top light shall be intended to be mounted with the emission area facing down, toward the canopy.

Total Harmonic Distortion (THD): A measure of the degree to which a sinusoidal wave shape is distorted by harmonics, with higher values of THD indicating greater distortion.

Track or Mono-Point Luminaires: Usually ceiling-mounted tracks or fixed single head. Adjustable aim “cans”. Complete LED fixtures (not replacement lamps in existing cans such as PAR 38 or MR16 lamps.

Traffic Sensor: The capability to affect the operation of lighting or other equipment based upon detecting the presence or absence of moving vehicles in an area. “Traffic sensing” and “traffic maps” may refer to vehicular traffic in an outdoor space, parking structure, or warehouse with forklift traffic; but may also refer to the movement of occupants in an indoor or outdoor space as pedestrians.

Troffer: Common recessed, suspended, or surface-mounted fixtures intended to provide ambient lighting in settings such as office spaces, schools, retail stores, and other commercial environments. Products submitted in these categories must meet the stated form factors with a tolerance of ±4 inches.

Troffer Retrofit Kit: Tube-shaped or strip-style retrofit kits for troffers. Products in this category do not replace the optical systems of the existing luminaire and leave the basic form of the existing luminaire intact or exposed. These retrofit kits may not employ existing lamp holders or “pin” bases.

Two Way Communication: The ability to both read settings from the device and adjust settings.

Type of User Interface: The type of interface provided by the control system for users to read and adjust control system settings during system start-up, commissioning, and/or ongoing operation.

U

U-Bend Lamps: LED lamps intended to replace U-bend T8 or T12 fluorescent lamps. These LED lamps shall employ a G13 base. Marketing material shall indicate that they are intended to replace T8 or T12 fluorescent lamps of the same shape. Products of different bases are not eligible.

UL Type A Lamps: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this primary use designation employ lamp holders to connect to the fixture being retrofitted and are designed to be “plug and play” replacements for fluorescent lamps. That is, products in this category operate utilizing an existing fluorescent ballast, and do not require mechanical or electrical changes to the fixture. Note that due to testing considerations, at this time only products that operate utilizing specific ballast types are eligible. Replacement lamps designed to operate utilizing magnetic ballasts or other types of electronic ballasts not specified are not eligible at this time. Also note that products claiming to replace T12 lamps are not eligible under Type-A primary use designations. (See Testing and Reporting Requirements for Linear Replacement Lamps for more detail on testing requirements.) Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

UL Type A/B Dual Mode: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category operate utilizing the existing fluorescent ballast and also have the ability to operate utilizing line voltage if the fixture is rewired to bypass the ballast. These products connect to the fixture using standard pin-base connections to the lamp holders. Note that due to testing considerations, at this time only products that operate utilizing specific ballast types are eligible. Please see the Testing Requirements for more detail. Replacement lamps designed to operate utilizing magnetic ballasts, or other types of electronic ballasts not specified, are not eligible at this time. Also note that products claiming to replace T12 lamps are not eligible under Dual-Mode primary use designations. Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

UL Type B Lamps: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category employ lamp holders to connect to the fixture being retrofitted, but do not operate utilizing the existing fluorescent ballast. These products require rewiring of the existing fixture to bypass the ballast and send line voltage directly to the lamp holders. (See Testing and Reporting Requirements for Linear Replacement Lamps for more detail on testing requirements.) Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

UL Type C Lamps: Two-foot, three-foot, four-foot, eight-foot, and U-bend LED “tubes” designed to replace two-foot, three-foot, four-foot, eight-foot, and U-bend fluorescent lamps, respectively. Products in this category employ lamp holders to connect to the fixture being retrofitted, do not operate utilizing the existing fluorescent ballast, and require rewiring of the existing fixture to replace the ballast with an external driver. The lamp holders are then wired to receive only the low-voltage electricity that is supplied by that external driver. (See Testing and Reporting Requirements for Linear Replacement Lamps for more detail on testing requirements.) Please note reference to UL type is derived from UL 1993, 4th edition, 2012-12-04 Section SA6.13.1.

Uncorrected UGR Table: A set of UGR values of the luminaire tested based on pre-set room definitions and a luminous flux of 1000 lumens, as defined in CIE 190-2010. The data are provided for 19 standard room shapes with 5 different combinations of room surface reflectance. For application of the uncorrected UGR table, the values must be corrected to the actual luminous flux in the luminaire.

Unified Glare Rating (UGR): A measure of the discomfort produced by a lighting system along a psychometric scale of discomfort. The Unified Glare Rating formula is a discomfort glare likelihood assessment method developed, published, and recommended by the CIE in 1995. The UGR formula produces a glare rating which is a psychophysical parameter estimating the discomfort in response to glare in a visual environment containing light sources. The practical UGR range is from 10 to 30 with most lighting systems producing values in that range. A high value indicates likelihood of significant discomfort glare, while a low value indicates little likelihood of discomfort glare. The development of UGR predated the application of LEDs in general lighting, and studies have reported that the original UGR formula tends to underestimate the discomfort sensation provoked by the highly non-uniform source luminance from some LED luminaires. A correction term to the original UGR formula was consequently formalized in a CIE report in 2019 taking into consideration the effects of non-uniform glare sources. Due to the recency of this new development, UGR in the remainder of this policy refers to the 1995 UGR formula, and the DLC will consider adopting UGR with the correction term in future updates when standards are available.

V

Vacancy Mode: A form of occupancy sensing that automatically shuts off power but requires manual interaction to turn power on.

Vertical Angle: The angular displacement in degrees from nadir, the point directly beneath the tested light source.

Vertical Refrigerated Case Luminaires: Strip lights in refrigerator cases, vertically mounted along refrigerator case door mullions. Category covers only complete luminaires, with all necessary components. Replacement lamps are not currently eligible under this category.

Very High Output (Outdoor): A General Application category for outdoor luminaires and outdoor retrofit kits in which the product’s light output is greater than or equal (≥) to 30,000 lumens.

W

Wall Wash Luminaires: Luminaires designed to illuminate walls in interior spaces.

Warm Dimming: Warm Dimming products have a single input which controls both color temperature and lumen output, lowering the values of both concurrently, most typically to mimic the color temperature shift of incandescent dimming. Products that require on an external control system to coordinate dimming and warming color temperature are not eligible.

White Light: Chromaticity coordinates within the twenty, 7-step quadrangles of ANSI C78.377-2017 Basic and Extended Specifications.

White Tunable: Products whose Correlated Color Temperature (CCT) can be adjusted via an input control of any type and whose chromaticity approximately follows the blackbody locus, providing white light at all input configurations.

Wi-Fi: A wireless protocol similar to the protocols that computers use and is a very robust wireless option. It also functions similarly to PoE in that it assigns IP addresses to each device and luminaire and is dependent on the user interface for granularity of dimming range.

Wildcard: A character or designation within a model number that represents all possible variations of the associated product attribute.

Wired Communication for a Single Control Point: See Communication Method Between the Driver and Control System

Wired Communication Protocol: A standardized communication system between two or more devices using a wired interface.

Wired Dimming: Modification of light output achieved through control communication signals sent via physical wires.

Wireless Communication Protocol: A standardized communication system between two or more devices using a wireless interface.

Wireless Dimming: Modification of light output achieved through control communication signals sent wirelessly.

Wireless Radio: A communication device that transmits and receives information via wireless signals.

Worst-Case: The operating condition or setting at which a product’s performance is worse than any other condition or setting.

Worst-Case Efficacy: The lowest efficacy performance for a product when operated in the Worst-Case condition.

Z

Zhaga Book 18: A smart interface between outdoor luminaires and sensing/communication nodes. It specifies power and communication aspects in addition to the mechanical fit and electrical pins. Zhaga Book 18 allows any certified node to operate with any certified luminaire. Certified luminaires and sensing/communication modules are available from multiple suppliers, establishing an ecosystem of compatible products. The book simplifies the addition of nodes such as sensors and communication nodes to LED luminaires. By assuring plug-and-play interoperability, the entire value chain benefits. It reduces complexity and adds value for the luminaire maker, installer and the specifier.

ZigBee: Low-power wireless protocol. It uses an IP address for devices, has a parallel full-duplex communication, and uses short- to medium-range RF to communicate.

Zonal Lumen Distribution (ZLD): A measure of the lumens emitted from the luminaire divided into a set of zones, where each zone represents a range of vertical and/or horizontal angles radiating from the luminaire.

Zoning: The capability to group luminaires/lamps and form unique lighting control zones for a control strategy via software-defined means, and not via physical configuration of mechanical or electrical installation details (e.g., wiring). Interior: Zoning is required for occupancy sensing, high-end trim, and daylight harvesting control strategies except for systems that feature luminaire level lighting control (LLLC) capabilities as defined in these requirements under “Reported Capabilities”, in which case zoning is only required for occupancy sensing and high-end trim control strategies. Exterior: Zoning is required for high-end trim.