I think any more than 6 plants under a 600 might be pushing it , some people do more, But if your looking for high yeild crops ... 4- 6 plants max for a 600w HPS i would think
Kind of a small space for a 600w, you'll need good ventillation in there. That aside, I fit 9 plants in 5 gallon buckets in a 3x3ft space under each of my 600's.
i have an extraction fan and that to fit in im just getting ready slowly dont want to rush into it. tried in my mams house in cuboard and it was shite. i have bought the bible aswell to help me along ment to be good
