Abstract: Apparatus for illuminating under water without ground fault interrupters comprising a 12-volt sealed beam lamp, electrical cord, and cigarette lighter plug for powering from the electrical system of a vehicle. A housing is recessed to receive the lamp and two types of sealers, one sealing the terminals and the other generally filling the void between the lamp and recess. A threaded stud with threaded fastener and washer is embedded in the void filling material and penetrates the housing to receive a vacuum cup suitable for holding the lamp on the side or bottom of a pool.