The 72 inch Coralife Aqualight Pro Metal Halide aquarium light is for reef aquariums. Please visit our Lighting Chart page to identify the best light for your particular reef aquarium. Dimensions: 72" X 15" X 2.75" without mounting legsNOTE: Do not put this light in a canopy. If you have a canopy you'll need a retrofit light.User Manual (pdf file in new window)Includes:Three 250 watt 10K HQI metal halide lampFour 96 watt 03 Actinic compact fluorescent lamps Four Blue Moon Glow LEDsRemote ballastsEasily removable acrylic lens coverBlack Mounting LegsTwo large cooling fansHighly polished reflectorThree on/off switches (one for the compact fluorescent bulb, one for the metal halide bulbs, and one for the lunar lights)Recommended Accessories:To keep the light cycle consistent, we highly recommend using a timer. To achieve the dawn/dusk effect we recommend the Coralife Aqualight Power Center Timer.The Aqualight Pro Suspension Hardware Hanging Device for hanging the Aqualight Pro from the ceiling attaches easily to any Aqualight Pro fixture. The Aqualight Cord Keeper the Aqualight Pro attaches to the back of your tank and holds the cords in place so the cords do not cause the light to hang unevenly. Fits up to 6 cords.Replacement Parts:We carry all the metal halide replacement lamps and compact fluorescent replacement lamps, and most replacement parts for the Coralife Aqualight fixtures