I cut the bottom branches that weren't getting much light so it only sounds big but it's mostly tall not wide, and i have a 40 watt flourescent on the side of it to make up for the spots that weren't getting any light coverage. I'll post pics later of how they're sharing one light.
Eventually i'll upgrade to 400w, it's only a 5x3x2 foot closet so i doubt i need 600. And also i plan to wait much less before flowering them, i underestimated how much they grow when switching to 12/12. Yeah the harvest on my first grow wasn't spectacular in terms of dense nugs but it was sticky and has glistening trichomes so i was not entirely disappointed, althought it was a rather low yield.
In fact, this strawberry cough gro is 12/12 from seed.