Pencil Head...I just grew out 6 plants veged for 2 months in a 4'x4' are under 1000w (first 3 weeks 600w and then added the 400w) I averaged 3 0z per plant. These were all spread out using LST, and 5 gl rectangle shaped trash cans, with soil. So he can do it.
I now have 10 clones in the same space that vegged for 2 months while this last bunch flowered. The 10 clones are not huge I kept temps on the cool side and lower levels of light, because I didn't want them to get huge while the others flowered. Once this last harvest was done I transplanted clones into 5 gl grow bags, pruned up unruley branches and lowers and moved into the flower room. I have plenty of room for the 10...and really if I wanted to put 16 small clones in there I could and still keep 1 sq ft per plant...but to me that is a little tight.
Anyway this is the sapce I deal with, if you have any questions you can send me a PM.
Oh yeah...I think I can pull more than a little over a lb from my space with this clone run...we'll see. This time I will have them under 1000w from the start, and have brand new bulbs in both lights...but I am switching up feeding and going organic...so who knows what kind of problems I have in store...lol.. just when I get it down, I got to throw a wrench in things.
I had to edit here, and say 400 is way too small. A 600w would have done fine with lumens per sq ft, but I didn't like the footprint I was getting from my one light, and the reason I added a second. With the 2 lights I was able to drop them down 10" from my canopy, with just the 1 I had to keep it up like 18-20" in order for the light to hit all the tops. If you want to use just one light get a reflector that is square so the footprint is the shape of your grow area...I have rectangle hoods...that I already had, and didn't even factor that in when I was building my space.
