Maxspect R4z0r Razor 180w 15k Aquarium LED Light 180 watt fixture - 27" X 10" X 0.9", 3 LED pads, 2 channels, 5.5 lb Utilizes the latest in LED design and technology Built in temperature controlled system engages active cooling to ensure optimized performance Cree XLamp XT-E and XP-E high intensity LED chips and 90 degree optics 2 channels with 6 preset time points