so thats 14 all together if they are standing 2 foot then i would say 3 ounces a plant with the right feeding and of course the required light, all i could say is if the leafs stay drowpy let the soil dry out (dont want to drown your babys), use some superthrive its really good during the early stages gets them big and strong, work on this basis 400w will give you @15 ounce a 600w @25 and a 1000w @45....