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.If you're going with a larger size canopy for the size light you're using, try to take advantage of reflective walls etc. Consider using a corner location or, if you can, hang something to create as much reflective surface as possible.
Also, some strains perform better in lower light conditions than others. Indica dominants versus Sativa dominants.
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..The rule of thumb used to be 50 watts per square feet. Unless you got a light mover I wouldn't go 7X3. 4x4 is what I would do. 4 plants.
Nothing wrong with a 600 watt hps, but if you haven't already bought your light(s) you may want to check out using two 315 cmh lights. Two points of light over your 4x4, and watt for watt compared to an hps , a good possibility of a higher yield too.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..