Yo have been busy and Im glad didnt miss this post in all the rest...
I knew right off you had a Green Thumb when you refused to let your poor badly nute burned girl die and still puled a harvest. That being said Im VERY impressed man and keep up the good work.
Yes definatly a possibility. I belive we went over this just a little while ago but didnt find the post.
With a 600W and a tight canopy you will only get about a foot or less of penetration and the bottoms will turn to stems, or have very little growth.