484 Watt might be why you had such a low yield with so many plants. I have almost 1000 CFL watts for only 6 plants. I expext 2 zip per plant dry and they were only a foot when I started flower. I might get closer to a pound with all 6 now that the nutes are under control. I will also be doing a comparison HID to CFL with a 600w HID vs. 1000w CFL but 500w with 20 plants not enough but the buds from your last grow looked great but sorry about the yield. Minimum 2 zips per plant dry or there is not enough light. These are my plants 21 days after changing to 12/12. I know they look shitty but they will still produce just fine.