If I'm gonna have a grow room approx. 4W x 4L x 6H, and perhaps 2-4 plants, would a 400w or 600w HPS be better?

I don't wanna buy a 400w and then always be wondering if I should have gotten the 600w...
Backpacker420 Reviewed by Backpacker420 on . 400w HPS vs. 600w If I'm gonna have a grow room approx. 4W x 4L x 6H, and perhaps 2-4 plants, would a 400w or 600w HPS be better? I don't wanna buy a 400w and then always be wondering if I should have gotten the 600w... Rating: 5