120-Volt 500-Watt bulb replacement, Fits Pentair Amerlite, SunBrite II/SunGlow II and SunGlow LTC pool/spa lights, Also fits Pentair StarRite pool and spa light housing models 05082, 05086, Measures 15-1/2-inch length by 26-1/2-inch height by 20-1/2-inch width