When you take 2' off the top of the room for lights and vents and 1.5' off the bottom for pots, suddenly that 9' is down to 5.5' - so that's the max height of any plant. I can actually have 12 plants in veg and 12 in flower cuz I'm growing for my sis too and there's a provision for that in the law. So I'll have 12 plants and just need to decide what will be the most efficient to way to farm them.

I started my plants in a 2'x2'x4' growbox with a whole bunch of the small cfl's. When I added a 125W cfl, they really loved it. The 125W was reasonable enough - $40 - and the plants liked it, but you get any bigger than 125W and they start wanting over $100 for the bulbs and that's just not cost effective compared to HID's.

Need to do research...