okay i got a 20 gallon high tank and this is my idea to build a led system. the black would be the heat sink then the color would be the leds and what color they will be and the gray is what i will mount the heat sink to. i would use Cree XR-E bulbs for all them but the reds, the red would be Cree XR-C, id use a BuckPuck 700mA dimming, and a 12V power supply. what do u think of my plan, any recommendations or changes i should do? Also i was woundering what would i mount the heat sinks to for the fixture its self to put on the tank and how do u mount the sink to what ever u want for the cover of the fixture? thanks for the help!