What exactly do you get a lot, people saying you can't grow 1.5kilo mj on 5x5 if you only use about half the space? Your pics and numbers are misleading. Why not post those subsequent 1.5gpw grows instead of your current 11 plants then...
I'm not arguing one can or cannot grow, and flower, cannabis under T5. Really not that uncommon on this side of the big pond. It's either T5 or HID (hardly and cfl or led). Getting such yields does however require using the space more efficiently than you showed in those pics, for example like this: