Rugged Die cast aluminum with Integrated heat sink high-flow design and clear tempered safety glass. Fully adjustable and available in a standard knuckle mount designed to fit over a 2 -3/8" OD tenon All external fasteners are stainless steel. Input voltage from 100-277. 347 and 480 volt is available (VAC 50-60Hz) Certified and tested to the North American UL 8750 Standard for wet location.