IO = A European aluminum insert inside and outside above the tube that offer 95% reflectivity Cool tube reflectors are suitable for HPS and MH tubular lamps uo to 1000watt. The reflectors are fitted with pre wired lamp holder and cord, Aluminum reflector inner & outer reflector and outer, heat resistance glass and 6'', 8'' ducting setup. The air-cooled full sealed reflector features a heat resistance glass tube, a European aluminum insert inside and outside above the tube that offers 95% reflectivity. Power is provided via a pre-wired 15 ft, 600-volt E39/E40 lamp cord outfitted with the industry-standard common lamp cord. The light fitting has 6'', 8'' flanges on both ends Accommodates most lamp types to 1000W Covering large area, plenty lights and reflection, NO HEAT, good for all growing process