how close???

My question is how close can you put the cfl's without burning the plant?

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.

2-3"

Thanks alot how tall should I build the room? Im making it by hand and wanted to keep it some what small but still big enough to do it right.

if building a cab would give yourself plenty of room and allow atleast 4-5 ft tall if your doing a scrog, I have no idea what you are using for pot size, screen height or even lighting but the taller the cab the more options you will have you can always lower a light but you can only raise it so far, and 4 ft is usually tall enough for most scrog even when using a small wattage hid light 400 watts or less, wich you will probably want to upgrade to soon if you are not using one already, as cfl's are not very good to use during flowering.

I have 150 w hps for flowering , Thanks alot and 4 or 5 ft sounds perfect

If 4or5 feet is all you need give it 6 feet.You never no you might need that 12"sometime.PEACE