Partsam Waterproof White 17" 23LED Clearance Light Bar Backup Reverse Fog for Trailer Truck Kenworth Freightliner Peterbilt Mack Function as: Backup Reverse Fog Light, Clearance Marker or Identification light Polycarbonate lens is sonic welded to the housing Sonically-sealed poly-carbonate lens and waterproof housings exterior use Easy to install, no any modification required, just plug and play. Wire Connection Tips:White Wire is the Ground; Red Wire is the high brightness; Black Wire is the low brightness.