Partsam 2pcs Red 15" 11 LED Surface Mount Sealed Stop Tail Turn Brake 4 Wires Light Bars Partsam (2 x Red ) 11 LED 15"Truck Trailer Waterproof Surface Mount 4 wires Stop Tail Turn light bar. No Corrosion, Sonically sealed, waterproof, waterproof lens and housing all in a single unit. Multi Function Rear Super bright 3 light Identification bar; That also functions as a high mount brake light; Lights up with turn signals and brake lights, fully sealed. Light Size: 395mm x 32mm x 13mm (15.5'' x 1.3'' x 0.5''); Hole Distance: 368mm (14.5'') EASY TO INSTALL: White wire is the Ground; White+Blue, 4 LEDs on the left light up; White+Yellow, 4LEDs on the right work; White+ Black, 3LEDs work.