Quote Originally Posted by thegrizz
I'm wanting to start a grow inside of two 21gal (24" x 16" x 20.1") stacked rubbermaid tubs coated in aluminum foil. Total I'd like to grow four plants hopefully yielding atleast an ounce per plant for a nice smoking stash for me and my buddies. I originally had some grandiose plans of growing 28 some plants under shoplights but I was informed it wasnt going to be a reality. I was wondering how many CFL bulbs I would need to provide sufficient lighting.

Do I need more space to cultivate four 1oz yielding plants? Can I pull this off? Any help is appreciated in advance.
first off the size of the box is ok, for reflectivity i would HIGHLY recommend you NOT use Foil for lining the box. for Foil conducts heat and WILL burn your babies if they even get that far. I would go with Myler or Flat White paint. paint is cheaper but Myler IMO is more effective.

Second 4 plants will be impossable to grow and oz per plant. maybe an eight per. i would recommend 2 plants in that box with LST and Scrog to get max yeild. which will depend on strains, genetics, TLC and Enviroment.

For lighting. rule of thumb is 50wpsf - 60wpsf for veg, and 65wpsf - 75wpsf. IMO more lights the better. just remember to keep the lights NO FURTHER then 2 inches away from the top of your babies. ALSO, don't you will need a couple PC fans to keep the inside of the box at a constante 75 - 80 Degrees. i suggest a 1 or 2, 120 mm PC Fans for a passive intake and exhuste (fan on bottom pushing air in one on top blowing air out, depending if your box runs hot or not) the fans will also help make provoke a stronger plant.

Ive been growing in 2x 30g rubbermaids (15w X 27L X 15D each) i got 2 boxes one for Veging one for Flowering. 175w Veg box 250w Flowering box. i grow 2 plants at a time to get a oz and half depending on strain.

Hope this helps