These light kits make it easy for workers to see which doors are open, closed or in motion, which is especially helpful when they need to work quickly in noisy or low-light areas. Two LED strips in straight or L-shaped brackets mount on the corners or sides of an overhead door frame and wire directly to an existing truck restraint. The lights change from red to green only when the controller detects that the restraint is engaged. An optional leveler light kit responds when the leveler is extended and clearly marks the entrance path for a forklift. The industrial-grade LEDs can stand up to tough environments and are visible to surveillance cameras. Compatible with most common manufacturers of restraints and dock levelers.