This high-efficiency T5 LED fixture is equipped with 21 watt AgroLED? iSunlight? lamps. These lamps combined produce an amazing 2,400 lumens per lamp for 2 ft and 4,900 lumens per lamp for 4 ft with a 5,500? K lamp color that is ideal for propagation and vegetative lighting cycles. Sun Blaze? LED fixtures feature an advanced reflector design that delivers excellent reflectivity and diffusion. White powder-coated steel housing is louvered for cool operation. Wire cable hangers are included with every fixture as well as V-hangers and hanging holes for side mounting (hangs horizontally or vertically) and lower ceilings. 12 ft power cord and on/off switch allow for easy operation. Eight lamp model features two on/off switches to run four lamps at a time if desired. The daisy-chain feature allows multiple fixtures to be plugged in together. Using the environmentally friendly, mercury-free AgroLED? iSunlight? lamps reduce electricity consumption by up to 25% compared to traditional T5 lamps. This high-quality light source provides excellent, on-target light output. One year warranty on lamps.