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 foot and 4,800 lumens per lamp for 4 foot with a 5,500K lamp color that is idea 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 foot power cord and on/off switch allows for easy operation. Eight lamp model features two on/off switches to run four lamps at a time if desired. The ñdaisy-chainî feature allows multiple fixtures to be plugged in together. Using the environmentally friendly, mercury free AgroLED iSunlight lamps reduce the electricity consumption by up to 25% compared to traditional T5 lamps. This high quality light source provides excellent, on target light output.