Because the plants are too tall I think I would burn them If I threw the 600 in there. My tent is 78 inches my hood is 10 inches so that's 68 inches to work with. The shortest plant is at 54 inches and the tallest is at 64 inches and only on day 8 of flower with at least another 13 days of stretching. I'm having to raise the light every other day as it is. I don't really care about yield as its all head stash but I'm shooting for 0.7 gpw off this 324 watt fixture.