Deep Dive into DLC V6.0: Challenges and Opportunities for Lighting Suppliers

In April 2025, the DesignLights Consortium (DLC) released the draft of its SSL V6.0 & LUNA V2.0 Technical Requirements, marking the most significant update since 2020. The new regulations raise efficacy thresholds, introduce new product categories, expand control requirements, and emphasize sustainability. For lighting suppliers, this is both a challenge and a golden opportunity for transformation.

Key Highlights of the New Requirements

Higher Efficacy Thresholds: Average increase of 15%, with some categories rising by up to 30%.

New Product Categories: Including solar-powered lights, amber LEDs, low CCT fixtures (1800K, 2000K), and Turtle Lighting for ecological protection.

Upgraded Controls: Step dimming is eliminated; continuous dimming and field-adjustable CCT are now standard.

Stricter Light Quality Standards: Standardized color maintenance reporting (ANSI/IES TM-35-19); maximum CCT limits to reduce light pollution.

Driver Lifetime Requirements: Standard tier products must meet a 50,000-hour driver lifespan.

Sustainability Metrics: Encourages reporting of lifecycle analysis (LCA), environmental certifications, and more.

Challenges Ahead

Pressure on R&D: Higher efficacy thresholds may disqualify existing products, requiring redesign of LEDs, drivers, and power supplies.

Increased Testing Costs: New control and quality metrics demand more rigorous testing, especially for dimming and color stability.

Faster Market Response Needed: Longer certification cycles and shorter product iteration windows mean upgrades must be completed before 2025.

Inventory Risk: Non-compliant products will be delisted from the QPL on October 1, 2026.

Strategic Moves to Seize the Opportunity

Proactive Product Upgrades: Prioritize development of high-efficacy, low-CCT, dimmable fixtures aligned with new standards.

Strengthen Control Compatibility: Products compatible with Networked Lighting Controls (NLC) will gain a competitive edge.

Embrace Sustainability: Prepare eco-friendly materials, recycling plans, and LCA documentation to boost brand value and meet future trends.

Target Niche Markets: Explore emerging sectors like healthcare lighting, ecological protection, and solar-powered fixtures.

Key Timeline

DLC V6.0 is more than a technical update—it’s a leap toward a smarter, greener lighting industry. Suppliers who adapt swiftly and strategically will be well-positioned to lead in the evolving market.