This high lumen, low profile, multifaceted T5 Reflector System puts out more than double the light energy of normal fluorescent lighting systems! T5s stay cool to the touch so they can be used in low clearance rack systems. The extremely energy efficient four (4) tube system produces up to 20,000 total lumens and, at less than 10 pounds, hangs easily! The system also features a noiseless rapid start, a three (3) inch low profile, and 10,000 hour bulb life.