I have a 48" coralife fixture brand new, 260 watts total. 2-65 watt acitinic and 2-65 watt 10000k. It has built in fans, 2 switches so you can put your lights on an timer. I'm running one right now on my 75 and you sohlud see the coraline growth on the rocks. I'm looking to get $175 and you pay shipping and handling.