So your foot print is 6x12 with 4 lights... Ive seen your hoods and your room a few times in posts.. I like it... do you feel your really stretching them 4 with the size of your canopy?
I really only use 6 of 8' width. The back 2' have tank, scrubber, fans, deheuy against them as well as 4 "side pots". I just netted 4oz from 1x4.7gal gg4 with side lighting only. Not under thbe hoods. Normal is 5.25-5.5oz per 4.7gal pot for gg4 and darlins net under hoods .