Buyers Products 2.5 Inch Round Marker Clearance Lights with Reflex and 4 LEDs are commonly used on trucks and trailers to meet FMVSS/CMVSS 108 regulations. The lights are powered by four LEDs and can be ordered with an amber or red color lens. They feature an internal Reflex optic, which eliminates the need for a separate reflector. Lights have a PL-10 connection. Lights are backed with a limited lifetime warranty.