The patented sealed optic technology allows removal of heat generated by the lamp without cooling the lamp. Made specifically for double ended 1000 watt HPS horticulture lamps (not included). Features German made, UL listed double ended sockets. Unique double ended construction allows for maximum optical efficiency and uniformity. Full spectrum DE lamps used in this fixture focus on the red component for increased photosynthetic response. They offer improved PAR values and increased PAR/lumen maintenance (up to 90% PAR at 10,000 hours of operation). The AC/DE’s patent pending design allows removal of heat generated by the lamp without cooling the lamp below proper operating temperature. 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. Manufactured with exacting standards and double neoprene gaskets for an air tight seal. Hinged glass makes changing lamps and cleaning glass easy. 15 ft detachable lamp cord. US patent: D698987, D698628. US Patent Pending: 29/446133, 29/477993, PCTUS2014014959, 13/533189, 13/945794. Chinese Design patents pending: 201330634881.9, 201330642281.7. Overall Dimensions: 32L x 20W x 9.4H Glass Frame Dimensions: 20L x 20W