Buyers Products 3.75 Inch Rectangular Incandescent Marker/Clearance Light is used on trucks and trailers to meet FMVSS/CMVSS 108 regulations. The light has an incandescent bulb and can be ordered with an amber or red color lens. It installs with a dual male barrel terminal style connection. An optional mounting bracket can be purchased separately. Lights are sold in bulk (multiples of 10) and backed with a limited lifetime warranty.