Partsam 2xRed + 2xAmber 17" 23LED Truck Trailer Stop Tail Turn Signal Park Brake Light Bar for Trailer Truck Boat Partsam ( 2xRed + 2xAmber ) Super bright LED Surface Mount 17" light bar, completely sealed & waterproof, polycarbonate lens is sonic welded to the housing. Functions as marker, clearance light, side marker, identification light, stop light, turn light, tail light and brake light. Each light has 23 Super Bright Diodes for a Bright Performance, used for heavy duty trucks, semi trailers, cargo trailers, boat trailers, work vehicles and a wide or narrow overland vehicle requiring quality rated lighting. The light bars have 3 wires for ground, brake, turn and tail light; EASY TO INSTALL: White Wire is the Ground; Red Wire is the high brightness; Black Wire is the low brightness. Offering customer technical service, feel free contact us for technical, installation and use question.