This LED light kit wires into an overhead door controller, changing the light color automatically based on the behavior of the door: solid red when closed, flashing red when in motion, flashing amber just before closing and solid green when fully open. These bright, visible light signals are especially useful in noisy or low-light areas to help workers quickly assess a door's safety. Three industrial-grade LED strips included: two to mount on the sides of the doorframe on the inside, and one to mount outside. Compatible with the most common door manufacturers. Five track types are available; see the Description tab below for more information.