I was going to ask the same question....
If you are using Fluoros, Id get the lights right on the plant... I grew mine from the beginning under flouros and when the plant grew it would touch the lamp.... never harmed it
CFL's get a little hotter... keep w/in an inch or 2...
I also dont know if youve got a fan or not.... if not, get one, you'll need it.
Good luck.... youre lookin pretty good though.... GraF