Why Do Daytime Running Lights Dim When Headlights Are Turned On?

1 Answers
EvelynRose
07/29/25 5:23pm
Because daytime running lights are very bright, they dim at night to prevent dazzling oncoming drivers. Function of Daytime Running Lights: Daytime running lights enhance visibility and make vehicles more conspicuous. This technology, specifically designed for daytime use, is more direct and effective than existing lighting devices. According to existing research, road users, including pedestrians, cyclists, and motorists, can detect and recognize vehicles earlier and better if they are equipped with daytime running lights. In the dark, when a driver turns on regular headlights, the daytime running lights automatically turn off. Installation Considerations for Daytime Running Lights: When selecting an installation location, daytime running lights should be installed in areas where the temperature does not exceed 80 degrees and where water accumulation is unlikely. During wiring installation, pay attention to the direction of the harness interface and the daytime running light interface, as well as the position of each colored wire in the harness relative to the car's wiring. The car battery voltage should be between 10V and 30V.
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