Dear DLC Stakeholders,

Due to unforeseen delays in development, the effective date for Technical Requirements V4.4 will be postponed until the end of the month. The postponed effective date affects DLC requirements for horticultural lighting products, DC/PoE products, and field-adjustable light output products. The DLC will send notice of the new effective dates shortly. Please continue to use Application Forms for Technical Requirements V4.3 at this time, and until Technical Requirements V4.4 go into effect. We sincerely apologize for any inconvenience.

Minor Policy Revisions Effective with V4.4

The DLC has also issued minor policy revisions to clarify definitions that delineate the differences between “Integrated-Style Retrofit Kits for 2×2, 1×4, and 2×4 Luminaires” and “Linear-Style Retrofit Kits for 2×2, 1×4, and 2×4 Luminaires” for product qualification eligibility. There are no other changes to the Technical Requirements for these retrofit products.

Additionally, Primary Use Designation (PUD) names have been revised for UL Type B and Type C within Linear Replacement Lamps, Mogul Screw-Base (E39) Replacements for HID Lamps and 2G11 Lamps to reduce confusion with Retrofit Kit Category products. There are no changes to Technical Requirements or eligibility for these lamps.

These policy revisions will go into effect with Technical Requirements V4.4.

Informational Webinars

Informational webinars were held to review the new Horticultural Lighting Requirements and DC/PoE and Field-Adjustable Light Output Requirements and are available to view on the DLC website. Please refer to these webinars for an overview of the changes associated with Technical Requirements V4.4.

Best regards,

The DLC Team