My suggestion would be to build a 4'h x 3'w x 2'd veg cab and a 7'h x 4'w x 3'd flower cab.... 6 - 100w equivalent CFL's in the veg cab and a 600w - 1000w HPS for flower.... My cabs are similar dimensions and I grow many more than just five....(perpetual SOG).... So you should have no problem fitting 3'ers in the flower cab.... Learn how to SCROG.... Improves yield when working with not so many plants....

Hope this helps....

CGI::::::

Oh and try not to start two threads with the same question.... Patience my friend....