Daytime running light for vehicles - Waterproof COB LED lamp 21cm white1、COB daytime running light is a new type of green electric light source for vehicles. The whole set of lamps has no pollution, no noise and no electronic interference. 2、Using advanced cob technology, this daytime running light has high brightness, uniform illumination, full color, lasting constant, low heat and low energy consumption. 3、High voltage protection function, when the power supply voltage ≥15.5V, the control part will automatically detach, and the LED light will be directly powered by the external power supply to protect the control module from damage. 4、Low voltage protection function, when the power supply voltage is ≤9V, the LED light is automatically turned off and the system is protected. 5、Frequency loss protection function, when the control frequency is abnormal, the LED light is automatically turned off to protect the control module and the LED light. 6、Anti-vibration, waterproof, corrosion resistance. 7、The surface of the lamp is neat and smooth without burr. 8、Low heat, long life, uniform illumination, simple installation. 9、No drive required, directly access 12 volt power supply. 10、This lamp can be used not only as a daytime running light, but also as a reading light in the cab.