Daytime Running Light for Captiva DRL’s are lights located on the front of a vehicle that remain on whenever the engine is running. Unlike headlights, daytime running lights are fairly dim and don’t illuminate the road ahead. The purpose of DRL is to increase the visibility of your car, so that other drivers can see you on the road. At night, your headlights and tail lights are illuminated, which means that it’s easy for other drivers to spot you. However, during the day, most drivers turn their lights off and it’s not as easy to spot other vehicles quickly. Otoproject’s DRL also can be use as a sein light, and sync to the main sein light.