Quote Originally Posted by Wert
4x4x4 would leave you about a foot headroom for the lights, 3 vertical feet should be enough to flower 4 nice plants IF you threw them in at about a foot tall, if headroom becomes a problem you could LST them.
Gotta keep in mind the height of the pot, the 'buffer' space between light and plants, height of light fixture and mounting hardware...No problem with this size growspace for CFL's, but using a 400w HID, a 4 foot tall growspace will let you grow plants approx. 18"-24" tall, so LST may be the only option, unless you build taller. :thumbsup: