Current Usa ACU01122 48-Inch Nova Extreme 4-Lamp T5HO Fixture with 2 Fans Nova Extreme 4-lamp T5HO fixture comes with 2 fans and individually contoured reflectors Powered by an advanced electronic ballast, the high output T5 lamps are driven to their maximum potential while ensuring long lamp life Integrated fan cools both ballast and lamps for efficient operation Comes with 4 (two T5HO 12,000K White/two 460nm actinic) 54-watt lamps Measures 48-inch length by 8-1/4-inch width by 2-inch height