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® 6500°K (blue) T5 HO Lamps. 3000°K (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.