I have built myself 2 LED units for my 1.2m Mix Reef. I ordered 48 LED's from Rapidled and a 4 channel controller from Boostled. The LED's comprised of: 20 Cool White 20 Royal Blue 4 UV 2 Red 2 Green 2 x Black anodised heat sink 6" x 9" The order shipped in just a few days. Carefully planned and layed out Using a 2 part thermal paste i glued the Led's to the heat sink in the order i had already layed out. time to set Careful solder the LED's togetter positive to negative always 60 degree optics put on Once wired the Driver is hooked up, with the controller set to 100% output, i adjust each Drivers SVR2 signal to 700ma.