The patented sealed optic technology allows removal of heat generated by the lamp without cooling the lamp below proper operating temperature. The built-in 8 in air-cooled flanges have a bead ring to keep ducting securely in place. 95% reflective textured German aluminum interior with 98% reflective corner inserts offer excellent uniformity, output and diffusion. Galvanized steel housing with durable powder coated finish. It features double gaskets (between glass & reflector and glass & frame) for an air tight seal. Hinged glass makes changing lamps and cleaning glass easy. Includes tempered glass, built-in socket & 15 ft detachable lamp cord. Comes with built in level for easy, consistent, level hanging.