Thanks for the awesome vat of knowledge, if I knew how to give you rep points, I Would.
Your welcome!
I am working on the whole lamp vs distance from screen. obviously my setup is limited by my space to the sides are closer to the lamp than 20" if they get that high. If I air-cooled my light I could get the light closer to the screen and it would be more the way your thinking with screen equa-distant from the lamp. The plant does grow up, no matter what.
So really if I had a wider and deeper screen and I could get more out of my lamp. I am by no means using all the available light space the 400 can cover. If I had scroged when I was in my rather large closet I think my yields would have been more than 1oz per plant.
With these things in mind... I have been thinking about a cabinet 24" deep by 36" wide (interior dimensions). I Think I could keep the height down to 4.5' . However.. That is just the space needed for the grow, not all the plumbing (fans etc). I want to build a cabinet that has a space for raising clones and small plants and houses all the goods for the main cabinet.
i've been lookin for ages for some info on scrogging and your journal seems the one. nice work man. oh... while i'm here when do you actually put the screen on. im in my last week of vegging too late or what?
Thanks! There are lots of peeps with scrog journals on here. I have only been growing this way for about 1 to 1.5 yrs now, but I love it.
As for your question... I have put it on very late in veg before. Realize that you can do so but may break some branches. If you tie it in to the screen and need to bend some branches rub them a little between your fingers first and bend (dont snap) them over. You will want to let them recover for a week in the screen before flowering.