This superb underwater light includes the 100W. Lights are bronze and copper construction with chrome-plated reflector shells. This light can be used in concrete, metal, fibreglass, or vinyl-lined pools and spas. All lights are UL listed, when used with our niches. Uses single 100 watt tungsten halogen bulb with average life rating of 750 hours and 1800 initial lumens. Low voltage does not require ground fault circuit interrupter. Transformer required. Compact 7-1/8" x 4" deep design makesinstallation easy.