The Vehicle Daytime Running Lamp (VDRL) is an automotive lighting device on the front of a vehicle that is turned on whenever the engine is running. The purpose of the VDRL is to increase the visibility of the vehicle during the daytime, making it easier for other drivers to see. The VDRL is typically a white or yellow light, and is usually located near the headlight. Some vehicles may have a VDRL that is integrated into the headlight, while others have a separate VDRL that is mounted on the front bumper or grille.