The DLC is pleased to release the first draft of Horticultural Technical Requirements Version 4.0 for public comment through the DLC Stakeholder Input Process. Hort V4.0 introduces three key updates to the Hort Technical Requirements that support the acceleration of energy efficient lighting in controlled environment agriculture. Please submit all comments using the V4.0 comment form linked below to comments@designlights.org by Thursday, December 19, 2024.

DRAFT 1 Horticultural Technical Requirements V4.0

V4.0 supports the acceleration of energy efficient lighting in controlled environment agriculture through three key updates:

• Efficacy increase: Hort V4.0 proposes to increase the efficacy threshold to 2.5 μmol × J^-1, which is an 8.7% increase over the Hort V3.0 threshold. This will set the DLC efficacy threshold for LED-based horticultural lighting at more than 45% above the most efficacious non-LED option.
• Removal of lamp categories: Hort V4.0 proposes to remove eligibility for lamps. This decision was made based on low application numbers in lamp categories.
• Clarifications to various requirements: A variety of clarifications are proposed throughout Hort V4.0, including for definitions of key terminology and for certain testing requirements.

Comment Form

Please submit all comments using the Hort V4.0 Draft 1 Comment Form to comments@designlights.org by Thursday, December 19, 2024.

Informational Webinar

The DLC will host an informational webinar on Thursday, November 21 at 2:00pm ET to review the proposed updates in the first draft of Horticultural Technical Requirements V4.0.

If you have questions about Draft 1 Horticultural Technical Requirements V4.0, please contact horticulture@designlights.org. We look forward to engaging with you as we continue to develop the Hort program.