New DLC Policy: SSL Technical Requirements V4.3 Released

LDS 7 CS DLC 400

March 26, 2018

The DesignLights Consortium (DLC) has released the final version of Technical Requirements Version 4.3. This update consists of policies for new categories of solid-state lighting (SSL) products, including colour-tunable products, field-adjustable products, and 3-foot, 8-foot, and 2G11 base lamps. These revisions were added to the Technical Requirements as Version 4.3 effective March 26, 2018.

Version 4.3 of the DLC application form is now available on the DLC Application Instructions pages for Single Product, Family Grouping, Private Label, and Product Update applications. These are the final DLC requirements resulting from proposals that were first released for comment in October 2017, and released for a second round of comments in February 2017.

Technical Requirements V4.3 includes the following expansions and revisions:

  • Colour-tunable products — colour-tunable lighting is a relatively new lighting system capability where the colour of a light source can be changed or tuned to end user preferences. The DLC has implemented new Testing and Reporting Requirements that enable high-quality, energy-efficient, colour-tunable products to be qualified and listed on the DLC SSL Qualified Products List (DLC SSL QPL). Colour-tunable products are defined by the requirements as products whose Correlated Colour Temperature (CCT) can be adjusted via an input control of any type and whose light output provides white light at all input configurations. The requirements include policies for both White-Tunable and Warm-Dimming products. Saturated, or full colour-tunable products are outside the scope of these requirements and are presently ineligible for listing.
  • Field-adjustable products — the current DLC dimming policy has been expanded to allow products with field-adjustable lumen output to be listed on the DLC SSL QPL and has been revised to include an updated definition of continuous dimming. The lumen output of field-adjustable products can be adjusted by the manufacturer, distributor, installer, or commissioning agent before or during installation or commissioning. This allows manufacturers and distributors to capture greater economies of scale and stock fewer SKUs, reducing manufacturing and distribution costs while providing customers greater flexibility. The V4.3 Testing and Reporting Requirements prescribe that field-adjustable products will be tested at the default setting, as well as the highest power setting, if different from the default.
  • 3-foot, 8-foot, and 2G11-base replacement lamps — the replacement lamp product category has been updated with new testing and reporting requirements that enable 3-foot and 8-foot linear replacement lamps, and 2G11-base LED replacement lamps, to be qualified and listed on the DLC SSL QPL. Including these lamps will facilitate efficiency program rebates and incentives to be paid on high quality and energy efficient LED replacement lamps in more applications, such as 3-and 8-foot commercial strip fixtures and 2×2 luminaires designed for lamps with a 2G11 base, also known as T5 twin-tube compact fluorescent lamps and trade names PLL and Biax.

Find out more:

Related Articles

Changing Scene

  • IES Educational Webinar April 2023

    IES Educational Webinar Series: April 20,2023

    March 28, 2023 Each month, the IES presents a live webinar on a current topic that helps expand your lighting knowledge and furthers our mission of improving life through quality of light. Live and on-demand are free to all IES members, and are eligible for IES continuing education credits (CEUs). Live webinars are available at… Read More…

  • Light Responsibly: 2023 IES Annual Conference

    March 27, 2023 Conference dates: Aug 3 – 5th 2023Location: Renaissance Schaumburg Hotel & Convention Center1551 Thoreau Dr N, Schaumburg, IL 60173 Theme The theme for the 2023 IES Annual Conference is Light Responsibly. This year’s theme focuses on the responsibility that the lighting industry has to itself, to the architectural and construction industry, and to the world… Read More…


  • Light at Night and the Inequality Gap: Progress and Challenges

    Light at Night and the Inequality Gap: Progress and Challenges

    March 9, 2023 In December 2021, the DLC hosted a webinar that explored issues related to “Bridging the Inequality Gap” in outdoor nighttime lighting. The conversation introduced research on how lighting contributes to discrimination and inequity in underrepresented communities, and generated heightened interest among attendees. To follow up on the research and work presented, the DLC sat… Read More…

  • LIT Design Awards Light Art Project Winner: Integral Group

    LIT Design Awards Light Art Project Winner: Integral Group

    December 19, 2022 Prize(s) Winners in Light Art Project Company Integral Group Lead Designers Ellie Niakan + Catherine Chan Photo Credits Catherine Chan Completion Date December 21, 2021 Project Location New Westminster, British Columbia, Canada Although appearing as solitary, trees are connected to one another through vast underground systems known as mycorrhizal networks. Through these hidden systems—a symbiotic relationship between plants… Read More…

New Products

  • Introducing LED-integrated Wine Rack System from MP Lighting

    Introducing LED-integrated Wine Rack System from MP Lighting

    March 23, 2023 Wine enthusiasts, sommeliers, and casual appreciators alike can all agree: wine is delicate. The naturally occurring chemicals in the wine can be disturbed by many environmental factors, mainly heat, lighting, and vibrations. To aid in the prevention of these factors spoiling the wine, wine racks can be installed. LED-integrated wine rack systems… Read More…

  • Punctuate with Hyphen. New architectural luminaire system by Fluxwerx

    Punctuate with Hyphen. New architectural luminaire system by Fluxwerx

    March 23, 2023 Fluxwerx makes a break from the ordinary with the launch of Hyphen—a family of discrete recessed and surface luminaires to design, define and leave your mark. With Portal, Fluxwerx pushed past conventional downlights and cylinders in our drive to give designers new and differentiated aesthetic options with innovative optics that maximize visual… Read More…