seriously, your setup is a little innefficient. you have 1 400 over 4 10 gal containers in a row, with 1 foot high plants in each. the two plants on the end are gonna blow, you wont get much light to them. the 2 in the middle will do better, under the light. if you would have put them in 5 gal buckets, you could have fit them under the light a lot nicer. If it was me in your place, I would hold off on flowering the 2 on the ends and do the middle 2 only(if left in those huge 10 gal pots). or else I would transplant into 5 gal, set them under the light footprint more efficiently, and even still, add another light.