Quote Originally Posted by KiNdBlunt
I plan on having about 20 plants flowering at all times in a SOG style perpetual harvest with a 400W HPS. What would be an ideal size enclosure for this grow light, space is not an issue i just need the best dimensions for this size light and plants.

I was thinking a 4x4 square flower cab with another about the same dimensions for mother/clone vegging with just cfl's.
My plans were very similar to yours my friend with the 400w hps for flowering, but sone learned that it wasnt enough light for the 4x4 space. 600w would be better, what I done was cut my cab down to 40x40x72 to support the 400w hps and now Im getting even growth across the canopy. You can get the 400w close to the tops with very little heat issues. I think anything larger than a 600 would surely bring you heat problems in the cab. oleschool