A daytime running lamp is an automotive lighting and bicycle lighting device on the front of a roadgoing motor vehicle or bicycle,automatically switched on when the vehicle's handbrake has been pulled down, when the vehicle is in gear, or when the engine is started, emitting white, yellow, or amber light. Their intended use is not to help the driver see the road or their surroundings, but to help other road users identify an active vehicle.

A daytime running lamp is usually automatically switched on once the ignition is on; other vehicles may switch the daytime running lamps on when the parking brake is released or when the vehicle is shifted into gear.