Thanks!
I'll look up that project box you mentioned. My concern about putting all the drivers under the stand is because when I do my water change, I have to take out the hood and lights so I can gravel vac the whole tank. If the wires are going all the way down to the stand from the fixture, it's going to be hard taking them out when I need to do my water change. If I can fit the LED+heatsinks and drivers in the fixture, what would be the best way to go about doing it? Solder them? Use Gorilla Glue? Also, should I get another driver + dimmer so I can keep the two blue LEDs separate in case I need to take down the fixtures during water change?