The Round Combination Red Stop, Turn, Tail, and License Trailer Light functions as a stop, turn, tail light and has a built-in license plate illuminator. It is ideal for multiple styles of trailers where incandescent lights are desired. The light grounds through the mounting bracket and has an additional wire to connect to a DC power supply. It features a universal mounting plate, a clear license plate illuminator lens, and a weatherproof, corrosion-resistant housing that withstands extreme weather.