Daytime running light

LED daytime running light on an Audi R8

LED daytime running light on a BMW 6 Series Gran Coupe

A daytime running light is an automotive lighting and bicycle lighting device on the front of a road motor vehicle or bicycle,^[1] They come on when the vehicles handbrake has been pulled down or when the vehicle is put in-gear, they show a white, yellow, or amber light. They help other road users identify an active vehicle.^[2]

Daytime Running Light Media

Full-voltage vs. parking light headlamp on European-market Volkswagen, 2007
LED daytime running lights on Audi A4
Use of day driving lights for cars in Europe
Hella 6-watt halogen-bulb DRLs for retrofit. Other retrofit DRLs use LEDs
Hella DRL retrofit kit in selective yellow offered in Sweden in the 1970s. Package text reads "Install Hella perception lights so you are seen in traffic".
Early type of DRL as used by Volvo and Saab on Nordic markets in the 1970s and 1980s: Bright filaments were mounted in the front parking lamps as "perception light"
Reduced-voltage high beam DRL on a US/Canada 2002 Lexus RX300