around here people seem to do 9 to 12 per light w/ about a 2 week veg. i would stick to the 80 under 6. sounds just right. i was using ebb and flow when i started years ago w/ rockwool, then went to drip with coco, then hand water with a pump, and just went back to E&F, but now i use coco not rockwool. i do 9 per in coco, 5gal E&F pots and i love it!!!! easy stuff. i go back to hand water the last week to use up the last of the nutes. never trust a timer. although i love these digital timers, have not had one fail yet....knock on wood. good luck and nice job on the room and babies, looks great!