wow so crazy! Why so high? Why not use crees? just curious. This should be an awesome fixture.
The system that I have on my tank right now consists of 90 Cree XRE-Q5's, running at 270 watts. The tank is a 225 gallon, so it requires quite a bit of power to keep my plants going strong. I've had it up and running for the last year and am really happy with it so far.
This new fixture may replace the old one on my tank, but I haven't decided yet. I am building the new one just for fun, just to see if it will work. It may prove to be complete "overkill" as I normally subscribe to the "some's good- more must be better" approach to doing things,but I won't know for sure until I try.
Here's a recent photo of my tank and a pile of drivers that I built for a LFS.The photo shows 20, and I built a total of 30. 30 drivers will drive 360- 3 watt leds.