The 7-Function Roadside Red Rear Trailer Light functions as a tail light, turn signal on the side, brake light, and license plate illuminator and offers built-in reflectors constructed from durable acrylic. It is a replacement light for the left side of your trailer and should be used on trailers under 80 in. wide. It is ideal for multiple styles of trailers where incandescent lights are desired. The light features a weatherproof, corrosion-resistant housing that withstands extreme weather.