SOCAL-LED 2x T20 7440 LED Bulb Switchback Extremely Bright 30W 3000LM COB High Power DRL Turn Signal Light Kit, Canbus Error Free LED Decoder Resistor, White/Amber Brightest Switchback led bulb on the market as this bulb use 30W COB Dual-color Chip which lights up 6000K White for Daytime Running Light and Amber Yellow for turn signal light. Exclusive design pre-wired canbus decoder in line for error free experience, led resistor is compatible with most vehicles with 12v power system. The bulb is equipped with constant-current driver and Aluminum Circuit Board and lamp body, fast thermal diffusion, heat-resistant, no digital and VHF radio signal interference. Switchback technology allows for color to change from white to amber while turn-signals are in use and switch back to white after. No hassle 45 days return for refund or replacement plus worry-free 1-year warranty. Cross reference: 7441 992 7440 7440ST 7440AL 7440LL 7440A