Seth's DIY Cree XM-L LED build

[Lampshade]

Looks great, i've been watching your build on these and you've done some great research. One thing to look at is what your corals will activly use. With LED's you can put out a wavelength very close to what the corals will need, and also what makes them bright. check out:
http://www.advancedaquarist.com/2006/9/aafeature - article on fluorescence, the chart at the bottom shows the excitation wavelength of most common coral's fluorescence
http://jeb.biologists.org/content/20....full.pdf+html - Paper on how corals respond to light, interesting info on polyp extension based one what wavelengths are present.

It's great that you are taking a mix of blue's and some TV. The mix should hit the peak's of lots of different corals providing great results. This is where LED's far surpass any other tank lighting, because you are going to hit everything in the 400 - 550 wavelength, and not just have one peak in there like most halides. Can't wait to see the results.