Yeah that's me. I just registered recently actually.
I'm disappointed with the Dr. Greenthumb line you're running in that case. MTF was bred to be squat and indoor. Plus I have always been under the impression it's a pure INDICA. A tall sat makes no sense.
Did you by any chance veg under a HPS? That's the only other way I can think of that you'd get such a tall lanky plant under such a big light.