In addition to that last question any experienced growers guess about how much will yield off each of these? Around 40 bud sites on each where hairs are forming, and both are over 3 1/2 ft tall, 250watt hps. Some hairs are starting to turn red but just a few and mostly on the bottom buds which are receiving less light. They currently are on 12/12 can I put them on a longer dark period to speed things up?