The Buyers Products part number 5626520 refers to a 6-inch Red Oval Stop/Turn/Tail Light Kit with 20 LEDs. This light is designed for use on trucks and trailers to ensure compliance with FMVSS/CMVSS 108 regulations. It features a durable polycarbonate lens, a PL-3 connection, and typically comes as a kit including a grommet and plug for easy installation.