Application: for use on heavy duty trucks, semi trailers, cargo trailers, boat trailers, work vehicles and a wide or narrow overland vehicle requiring quality DOT rated lighting. Product Features: Brand new, waterproof, Super bright Red LED Surface Mount, sealed 15" light Each light has 11 Super Diodes for a Bright Performance. Functions as clearance, side marker or identification light, stop, turn, tail and brake light These light bars have 3 wires (White is ground, Black is running lights w/ low brightness,Red is turn and brake w/ high brightness.) They have 2 screw holes for mounting Comes with a Poly-carbonate Lens with All Weather Housing for durability Convert your old incandescent lights to more modern LED's. Dimensions: 15.5" x 1.25" x 0.5" Hole Center to Center is 14-1/2" Voltage:12V Wire Connection Tips: White Wire is the Ground; Red Wire is the high Output (Brake & Turn) ; Black Wire is the low output (marker lights). Product included: 2pcs 15 inch 11 LED Red stop, turn, tail and brake light bar Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.