Amber, B50 replacement, incandescent bulb, valox body with ground strap. Lamps have a 1/4" N.P.T. rear entry. All B50 series valox direct aluminum replacement lamps have a ground strap that utilizes the base as a ground like an aluminum base lamp. Incandescent lamps feature a 920116 red or 920117 amber deep lens and a 1157 bulb in a double contact socket.