800w of cfl eh? that seems a bit extreme; you might consider a metal halide if you need that much output; maybe a 400w hps and 400w MH in the grow room? you could even set teh HPS to run less than 18 hours during veg, and the MH to run less than 12hours during flower if you want to save a bit of electricity

anyway, if you can use an HPS then i don't see why you need that much cfl; if you cool an hps, you can probably cool a MH as well. or you can just go with less cfl's. that seems like a lot of wasted energy and cost to me