Seth's DIY Cree XM-L LED build

[Reefer Rob]

There is a massive LED aesthetics thread on RC you might want to read before you go with cool whites. Lots of people complaining the light is very flat, and they add reds and greens trying to improve the color.

I went with about 2:1 royal blue to neutral white and to color is gorgeous. After only 2 weeks it's still too early to say anything about algae growth, but I believe corals also need red spectrum.