Thank you for all of your replies
im limited to space with the tents
growing with a hydro drip feed system in hydroton, with 8 plants per 2, 315w cmh lights.
im pulling 3-3.5oz dry per plant, but know i could do better thats why im focusing on the lighting and im also trying out coco on my next lot.
i also use parabolic shades so have struggled to put any more lighting in there, i may try adjust a wings that way i could get an extra cmh light in or a qb board in the centre