Glossary

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

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.

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.

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.

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.

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.

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.

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.

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

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

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.

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.

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

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

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

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.

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

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.

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.

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.

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

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).

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).

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).

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.

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

he locus of points on a chromaticity diagram representing the chromaticities of blackbodies having various (color) temperatures.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

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

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.

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

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.

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.

See Chromaticity and D_uv

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.

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

See 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.

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.

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.

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.

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.

Standards that address the cybersecurity of each individual physical end device in a networked system.

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

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.

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.”

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

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).

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

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.

See Controller

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

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.

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.

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

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.

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

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.

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.

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.

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.

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.

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.

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

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.

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).

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.

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

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 include luminaires, switches, standalone sensors, shades, plug load controllers, etc.

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.

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.

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

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.

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.

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.

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).

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.

See Level 2 Application

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.

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.

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

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.

Control capabilities that are integrated within or inherent to the luminaire.

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).

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.

Ceiling-mounted luminaires for use outdoors or in locations open to elements in gas station canopies.

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

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

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.”

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.

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.

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

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

Pendant, recessed, or surface-mounted fixtures specific for indoor high ceiling spaces (intended for ceilings ≥25′).

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

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

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.

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.

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.

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.

The minimum and maximum allowable operating inlet fluid temperatures of an externally supplied actively cooled fixture.’

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.

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.

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.

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

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.

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.

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.

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.

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.

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

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

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.

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.

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.

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.

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

Small, low-lumen, directional luminaires intended to highlight objects and areas in outdoor lighting. Manufacturers must follow NEMA guidelines for declaring beam spread.

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).

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.

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

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.

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.

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.

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

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.

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

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.

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.

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

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.

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.

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.

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.

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

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

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.

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.

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

Pendant, recessed, or surface-mounted fixtures specific for indoor ceiling spaces (intended for <25′).

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

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

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.  

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.

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.

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.

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.

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

The ability to vary the light output of a fixture using a knob or other control device integrated into the fixture.

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.

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.

The power required to provide 100% of rated light output.

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

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.

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

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

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.

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.

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.

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.

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.

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.

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

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.

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.

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).

The input voltage range described on the product specification sheet and other product documentation.

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.

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.

A product that emits radiation in all directions except in the base direction.

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.

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

Other wired communication protocol as specified by the manufacturer.

Other wireless communication protocol as specified by the manufacturer.

Typically, walkway or security lights affixed to building wall. May be box shaped. These products produce no uplight.

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.

Typical streetlights, parking lot lights. May be cobra-head shaped, shoebox, etc.

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.

The maximum designed power supply provided by a driver.

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.

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

Mounts that increase uplight the most or reflect light in any unintended direction.

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

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

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.

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.

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.

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

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.

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

A characterization of the ability of the device to maintain its output within the given parameters over time.

Irradiance within the wavelength band 400 to 700 nm.

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).

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

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.

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.

Tested at one or more of the following mounting heights of 20ft, 30ft, 40ft, 50ft & 60ft.

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).

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.

Lists the Type and Class of PoE utilized.

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.

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

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.

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

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.

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

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.

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.

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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 “strip” luminaires and other types of linear ambient luminaires. Do not employ existing lamp holders or “pin” bases.

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

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

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

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

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

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

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

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

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

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

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.

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.

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.

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.

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

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.

The direct measurement of a light source with a shield attached.

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.

See Level 1 Application

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.

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.

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

The type and concentration of solution used for cooling of externally supplied actively cooled fixtures.

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.

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.

Describes the power emanating from a light source as a function of wavelength. The information can be presented graphically or as a numerical table.

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

Describes the power emanating from a light source as a function of wavelength. The information can be presented graphically or as a numerical table.

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).

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

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.

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

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.

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).

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

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.

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.

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.”

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.

The probe location, as specified by the LED package manufacturer, for performing in-situ temperature measurements.

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.

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.

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

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

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

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.

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.

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.

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.

The ability to both read settings from the device and adjust settings.

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.

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.

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.

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.

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.

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.

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.

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

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

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.

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.

Luminaires designed to illuminate walls in interior spaces.

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.

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

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.

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.

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

See Communication Method Between the Driver and Control System

A standardized communication system between two or more devices using a wired interface.

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

A standardized communication system between two or more devices using a wireless interface.

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

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

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

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

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.

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.

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.

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.