why would you want to grow auto flower? the yield is smaller and less potent and you would run those hid's under 24/0 which is a big waste of electricity. also if you start with seeds your plants tops are most all going to have a different height and grow speed. yield is determined mostly by your grow knowledge and depends on the capability of the strain your growing. i would do a small grow and practice. wouldn't you be scared to toss all that dirt since your so paranoid just to say "im growing" instead of "bob"?