this couldnt be any more wrong..... youll have 2700 x 8 lumens8 42watt @ 2700 lumens will only give you 2700 lumens. But having eight of them will give you better coverage. Put them as close as possible to the plants.
THATS WHAT I WANNA HEAR! thanks dude. this other guys doesnt seem to know what hes taking about. PEACEno man total lumens are added together 8 x 2700 = 21600 lumens
google it if you don't believe me
-pot