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: https://www.designlights.org/news-events/news/new-dlc-policy-ssl-technical-requirements-v4-3-released/

Related Articles


Changing Scene

  • August 27, 2026 - Symmetry Lighting Announces David McCrone as Their New Commercial Sales Manager

    Symmetry Lighting Announces David McCrone as Their New Commercial Sales Manager

    Meet David McCrone, Symmetry Lighting’s new Commercial Sales Manager!⁠ David brings extensive leadership experience in the lighting and electrical industries. His combination of industry expertise and technical knowledge is a valuable asset as they continue to grow and enhance the support they provide to their customers and partners. They are very excited to have him… Read More…

  • August 26, 2026 - Ben Fischer & Andrew Parker Promoted at Salex

    Salex Announces Two New Leadership Updates

    Salex is excited to share two important leadership updates! Ben Fischer, Principal has been appointed Vice President Sales & Strategic Accounts, where he will lead Salex’s overall sales strategy, supporting continued growth across their markets while strengthening their sales teams, key accounts, and manufacturer partnerships. Andrew Parker P.Eng., Principal has been appointed Vice President Technical… Read More…


Design

  • Lumenpulse: Ethernet as a Backbone for Lighting

    Lumenpulse: Ethernet as a Backbone for Lighting

    Ethernet is a high performance and reliable networking technology that has been making inroads into architectural LED lighting applications. Having undergone decades of research and development as a workhorse of the IT industry, Ethernet brings a refined pedigree to a lighting industry which is trending toward highly intelligent light fixtures and services. This article highlights… Read More…

  • LEDVANCE: Four-Inch vs Six-Inch Recessed Lighting – Which Is Better?

    LEDVANCE: Four-Inch vs Six-Inch Recessed Lighting – Which Is Better?

    When you need to add lighting to rooms in your commercial and residential spaces, one of the most popular options today is to install recessed light fixtures. It provides a visually pleasing effect while saving space, especially on ceilings. However, many people are confused about which size is appropriate for their needs. Usually, people hesitate… Read More…


New Products

  • WAGO: Lighting Management Solutions

    WAGO: Lighting Management Solutions

    WAGO Lighting Management is a sophisticated solution for lighting control in large spaces such as production facilities and warehouses. Using a combination of predefined hardware and user-friendly software, WAGO offers a lighting management system that facilitates design and commissioning of new lighting systems while providing numerous additional advantages for their operation. Read More…

  • Leviton – Certolux Visioneering (Viscor): LMNW Series LED Wide Commercial Wrap Luminaire

    Leviton – Certolux Visioneering (Viscor): LMNW Series LED Wide Commercial Wrap Luminaire

    When dependable row mounting performance and broad, uniform illumination are required, the LMNW wide commercial wrap delivers a practical solution for both renovation and new construction projects. Designed as a versatile commercial wrap, LMNW combines a wide footprint with a fully illuminated polycarbonate lens to provide smooth, even light distribution while helping simplify upgrades from… Read More…