Buyers Products 4 Inch Round Stop/Turn/Tail Light with 10 LEDs is used on trucks and trailers to meet FMVSS/CMVSS 108 regulations. The light has a red lens and is available with a PL-3 or AMP-style connection. Lights are sold in quantities of 10. The PL-3 model is also available in individual kits that includes a plug and grommet for installation. Lights are backed with a limited lifetime warranty.