I have a double C24 and can put about 15 in there if kept under two FT and a low side branching strain. I think that you could go with 8, but 6 would be optamal IMO. The other questions you asked may depend on the light your using, I may of skipped it.
Adieu
BlueBear Reviewed by BlueBear on . ???? : ventilating a C-24 close t: (-) pressure and how it benefits I have decided to grow in a C-24 cab and figured I??d start with the components of a closet first and then once I get the closet I can set everything up in it. So far I completed my DIY carbon scrubber and am currently going to wire my DIY cool tube, just have to drill a hole through the reducer/inducer for the connections, and am in the process of finding a cheap/er can-fan and I wanted to know: -Can a blower be used in the same fashion as a can-fan regardless of CFM rating? -Anything Rating: 5