Ok, I have a scrog that I started about 4 weeks ago. There is a link to my journal with pictures in my signature below. Both plants will be reaching the scrog screen in a day or two. My question is when do I switch to 12/12? I have seen so many different suggestions that it has left me a bit confused. My grow space is 3.5 sqft. My screen is about 18" over the tops of my pots which are 6 liters. I have one Pineapple Express and one Maui Waui growing in there; so nealy 100% sativa. I made the screen myself as you can see in the pictures posted on my journal. The openings work out to be 2" x 2". I should switch to 12/12 ____! A) Kick that bitch to 12/12 right now. Cause those sativa's will grow like made once you switch. B) Wait until the plants grow through the screen by a few inches and, than pull the cola back under and switch to 12/12. C) Wait for the screen to be 50% full and than switch to 12/12. D) wait for the screen to be 70% full and than switch to 12/12. E) None of the above - (please explain your thoughts). Feel free to post your answer here or even better, on my actual grow journal. And, thank you in advance.