Buyers Products 2 Inch Round Marker/Clearance Light with 4 LEDs is used on trucks and trailers to meet FMVSS/CMVSS 108 regulations.   Lights are available with a red or amber colored lens. They have a PL-10 style connection.   Lights are available in bulk (multiples of 10)  or in individual kits that include a grommet and plug. The lights are backed with a limited lifetime warranty.