RAZRLites LED Tubes by Celeritas Lighting Group are the cornerstone of the popular LEDPro retrofit kit line. The ST8LED, 9 Watt-4000 Kelvin, 50000 hour bulb, produces 950 Lumens, the equivalent of up to a 17 Watt fluorescent tube. Celeritas Lighting Group, known for their superior knowledge of the LED tube market, have designed this tube with longevity, light output, and efficiency in mind.