Certification Introduction：

DLC certification is a joint organization of the North American Energy Efficiency organization (NEEP), and the certification is used to increase incentives for high-efficiency lighting products in commercial buildings. Some certified products can receive energy subsidies from DLC member institutions. The cooperative members of the DLC believe that only products with high quality and high performance that have undergone rigorous testing and verification are eligible for energy subsidies. Therefore, they developed the certification list DLC QPL, limited the scope of subsidies, and formed a trade barrier in a small area (energy efficiency programs of public utilities, regional energy stimulus programs and energy saving programs, etc.) Field blank. On September 8, 2017, the DLC updated the web design and added a "Future Development Plan" column. This change will make the DLC project development more transparent and directional.

On February 14, 2020, the DLC officially released the new standard DLC SSL V5.0&5.1, and it will be accepted for submission from February 18, 2020. The transition timetable for the new and old standards is as follows: