Wider advanced reflector design offers excellent reflectivity and diffusion. White powder-coated steel housing is durable has louvered venting and for cool operation. High output lamps have an extremely high lumen per watt rating. 5,000 lumens per lamp = 40,000 lumens! Comes with Spectralux? 6500øK (blue) T5 HO Lamps. 3000øK (red) lamps can be purchased separately. The Smart Volt? electronic 120 to 277 volt ballasts are energy efficient and high output. Wire cable hangers included with every fixture. Allows fixture to hang horizontally or vertically. Dual on/off switches eight lamp model features on/off switches to run four lamps at a time if desired. 12 foot 240 volt power cord for easy operation. One year warranty on lamps.