Buyers Products 4 Inch Round Backup Light with 10 LEDs is used on trucks and trailers to meet FMVSS/CMVSS 108 regulations. The light has a clear lens and uses a standard PL-2 connection. Available in bulk (sold in multiples of 10) or as individual kits that include a PL-2 plug and grommet for installation. Lights are backed with a limited lifetime warranty.