Upgrade D1S D1R LED Headlight Bulbs with 4-Level Decoding, 70W 8000LM 400% December 1, 2023 admin 4-LEVEL DECODING D1S LED HEADLIGHT—Upgrade D1S led headlight with 4-Level decoding, which can greatly handle the CANBUS error issue. FAST COOLING DOWN—– Cooling fan & copper plate built in, providing a quick heat dissipation capacity.