DLC Releases Technical Requirements V4.2

DLC Releases Technical Requirements V4.2

May 10, 2017

The DesignLights Consortium has released Technical Requirements V4.2, which includes new expansions and revisions to the technical requirements for solid-state lighting (SSL) products.

Technical Requirements V4.2 is the finalization of several months of discussions with DLC members and stakeholders, and includes the following expansions and revisions: new testing requirements for products under specialty use designations with the word “hazardous” in the designation descriptor; a revision to the linear replacement lamp policy to create new, distinct general applications for T5 and T5HO four-foot replacement lamps; and allowances to the efficacy requirements for products that have low CCT or high CRI.

New testing and reporting requirements for hazardous location lighting

Under the V4.2 requirements, products applying to a specialty use designation with a “hazardous” descriptor must undergo testing and certification to UL 844 by a relevant safety organization.

Linear replacement lamps

Four-foot linear replacement lamps are broken into three general application designations, with distinct eligibility, testing, and performance requirements:

  • T8 replacement lamps — LED lamps that are 48 inches long and employ a G13 base
  • T5 replacement lamps — LED lamps that are 46 inches long, employ a G5 base, and are intended to replace T5 fluorescent lamps
  • T5HO replacement lamps — LED lamps that are 46 inches long, employ a G5 base, and are intended to replace T5HO lamps

Allowances

The concept of allowances was first introduced with the release of Technical Requirements V4.0. Following review and deliberation of submissions received from manufacturers in response to a request for proposals on allowances needs, the DLC is launching an allowances program with allowances of up to 5% to the efficacy requirement for products that have low CCT or high CRI. Please note: V4.2 Allowances for CCT and CRI will be retroactively applied to all products on the QPL prior to 4/1/2017 (that is prior to the V4.0 de-listing).

Correction to multiple LED policy

Technical Requirements V4.2 includes a correction to the multiple LED policy, which previously was restricted to products employing multiple white-light LEDs only. This restriction is now removed.

Implementation timeline

The implementation timeline of Technical Requirements V4.2 affects only manufacturers of linear replacement lamps and hazardous location luminaires listed under specialty use designations that are affected by this revision:

  • manufacturers may submit applications that comply with these policy changes immediately
  • a submission grace period is in effect until May 19, 2017. During this grace period, manufacturers may submit listings to the DLC QPL under the V4.1 requirements
  • a listing grace period is in effect until July 28. Following this grace period, all products must meet the V4.2 requirements to remain listed

Find out more: www.designlights.org/news-events/news/dlc-releases-technical-requirements-v4-2/.

Related Articles


Changing Scene

  • LEDVANCE Expands Ontario Presence with New Specification Agent

    LEDVANCE Expands Ontario Presence with New Specification Agent

    LEDVANCE is pleased to announce the appointment of Sterling Architectural Products Ltd. (Sterling Lights) as their new specification agent in Ontario. This partnership strengthens LEDVANCE’s presence in the region and reinforces their commitment to serving the professional lighting design and specification community with innovative, reliable lighting solutions. With decades of experience and a service-driven mindset,… Read More…

  • May 29, 2025 - Eureka Wins Three 2025 Red Dot Awards for Product Design

    Eureka Wins Three 2025 Red Dot Awards for Product Design

    Eureka is pleased to announce that its Velia, Cirra, and Junction luminaires have each received a 2025 Red Dot Design Award for Product Design. It is the 11th consecutive year that Eureka products have been honored with this prestigious award, which is a testament to the company’s consistency and relentless drive to design exceptional luminaires.… Read More…


Design

  • The Difference Between Accent, Ambient & Task Lighting: Ultimate Guide

    The Difference Between Accent, Ambient & Task Lighting: Ultimate Guide

    In interior design, lighting is not just about brightening the room. Sensitive lighting layout is the key in the whole aesthetic atmosphere. An outstanding lighting solution will not rely on one type of fixture. Rather, it is through the combination of different types of lighting. Accent, ambient, and task lighting are three basic types of… Read More…

  • Graphic Office Interiors Enhance Their Office Space, Incorporating State-Of-The-Art Lighting Solutions

    Graphic Office Interiors Enhance Their Office Space, Incorporating State-Of-The-Art Lighting Solutions

    Graphic Office Interiors, a renowned office design and furnishings company serving Vancouver Island since 1966, embarked on a unique lighting project for their personal office in Saanichton, BC. This project marked the first collaboration between Kelly Inglis of Mac’s II Agencies and Graphic Office Interiors’ in-house registered interior designer, Laura Harlos. Known for their exclusive Steelcase furniture line, modular moveable… Read More…


New Products

  • Amico: SOLAR ECLIPSE – 2X4 Multi-Functional Luminaire

    Amico: SOLAR ECLIPSE – 2X4 Multi-Functional Luminaire

    The Solar Eclipse Series provides a multi-functional luminaire that supports the demands of the hospital environment. The sleek and modern design merges architectural aesthetics with exceptional lighting performance to improve patient comfort while maximizing clinical efficiencies. This architectural patient room fixture offers reading, ambient, and exam functionalities and an optional night light. Multi-functional capabilities provide… Read More…

  • Signify: Unleash Colors from Your TV Screen with New WiZ HDMI Sync Box

    Signify: Unleash Colors from Your TV Screen with New WiZ HDMI Sync Box

    Signify has announced the release of new TV sync features and products for its smart lighting brand WiZ, enabling users to effortlessly immerse themselves in a world of dynamic colors and moods. With the new WiZ HDMI Sync Box with TV backlight, users now have an easy and affordable way to sync lights to their… Read More…