An illumination system configured to be attached to a rear of a vehicle with a tow hitch, and positioned to direct light towards the ground behind the vehicle and the tow hitch. The illumination system including a housing, a socket with differently shaped fingers for attachment to the housing in a proper orientation. An LED light is received in the socket for directing light rays in a first direction, and an inner lens is coupled to the LED, and configured to receive the light rays such that a flat portion of the lens directs some of the light rays substantially along the first direction and an angled portion of the lens directs some of the light rays in a second direction different from the first direction. A protective outer lens surrounds the inner lens, and includes transparent and opaque portions.