Development of a portable underwater light

This paper discusses the development of a unique portable underwater light which is rugged, shock-resistant, and is suitable for continuous use in air or underwater. The light is designed for general area illumination either underwater or on the surface. The light assembly consists of a 10,000 lumen tungsten-halogen lamp, a heat treated globe, a heat-sinked fixture, and a cable reel with appropriate electrical connections. When operated in air the fixture stabilizes at a temperature of approximately 850 degrees F, and it may be immersed in cold water while in operation without damage. The fixture will withstand static pressure in excess of 2000 PSI.