Using a corner is something I definitely have considered, but I like the idea of full access around whole canopy, especially with a scrog. The room is actually going to be 8x7. But I don't want to get more then 2 600w hps.
2 600w hps for a 4x4 canopy seems a little overkill to me, especially since I'm running 1 600w in a 4x4 right now, I couldn't imagine a 2nd..