you should be able to keep them within a couple of inches from the plants but they need to be kept close.
and your other question about scrog height the screen is usually kept inbetween 7-12 inches above the pots or meduim just make sure you have room to get under it for training and you should be using clones if you are going to be doing a scrog.
bejay Reviewed by bejay on . how close??? My question is how close can you put the cfl's without burning the plant? Rating: 5