RM = 8' X 12' i only have 4 400W lights BUT i also have a 600W light i was gonna use for seedlings in the closet i just vacated (3' x 5')

ok if i mount them side by side every 3' on the long axis will there be enough light on the sides as the shorter axis is 8'?

i ask cuz ive seen graphs in cervantes that show the horiz mounted bulbs are weak top and base and if i mount side by side wont there be a really bright centerline and a weak parameter?...this is gettin me stressed i cant fuck this up man

thank you