The Optronics Light Guide LED Lamps employ patent-pending technology that enables the illumination of complex shapes and patterns. The LEDS are available in 4" round or 6" oval stop, tail, turn and backup lamps, and are available in flange-mount or grommet-mount versions. The STL603RB and STL602RB have red lenses, and BUL603CB and BUL02CB have clear lenses. The lamps meet all FMVSS 108 photometric requirements for visibility and safety, and come with a lifetime warranty protection.