IML Underwater Hull Light, 120VAC/150W (with lamp and ballast), stainless steel, clear lens, IP66, metal halide A high output 120VAC/150W (50/60Hz) Thru-Hull Light designed with utmost attention to thermal management (maintaining low operating temperature). Thermal cut-out switch will prevent overheating should the unit be left on while hull is out of the water when planing or during haul-out. Casing and bezel are made from 316 stainless steel. Also included is a high performance metal halide arc lamp & ballast. Ballast housing is complete with weather-proof connectors and pre-formed cabling. For transom mounting only.