Ultimately 600w is the best value for money, the only reason to go smaller is to experiment with smaller spaces. If I was dead set on growing the most weight I could, rather than experimenting and enjoying myself, I'd run a 600w on a light mover in an ~8 plant tent and aim for 1gpw. If you've got the space and the privacy it's pretty foolproof.
Edit: I actually retract the above, I'd be far more likely to go LED than using any kind of discharge bulb again.
For a cab this size you'd use screw in LEDs and likely have more even light distribution. I went CMH because I got the gear for next to nothing, I was originally using CFL. There may be some advantages to CMH over LED but probably not in this cab.
Hope you find a keeper in that Delicious Candy like I did. I like them so much (a freebie) that I ordered some Delicious auto flowers.Few cab mods up next, then popping the NL5 and delicious candy.
that strain your buddy gave you, that you just harvested. Has a pretty cool/odd structure yea? Is she pretty dense? How much you think dry weight is, without checking what it weighs now lol..Hows the smell after chop?
Whats in the plans for next cycle? Cant wait!