Thought I'd share my DIY LED build. I caved in and bought the LED Group Buy heatsink. I love DIY but I have no resources to build a 6 foot long aluminum heatsink so I had to buy one. I have no regrets though because it is designed soooo well that it was totally worth the money. Anyways, I loaded the heatsink with a full spectrum of leds, UV, Violet, Deep Blue, Blue, Cyan, Red, Warm White and Neutral White. All of the LED's are driven by meanwell PWM drivers, running at a max of 3 watts per LED. I have two 500 watt power supplies supplying the meanwells. I have them all controlled by a Coralux Storm-X controller which is a thing of beauty. The output on this setup is crazy, and being fully customizable I can add more drivers and LED's if I ever get a deeper tank!
