This week I switched over to 12/12 light cycle to begin flower stage. Cycled through a sequence of blue, red, and purple light to develop taller (red) and fuller (blue) foliage, using both (purple) at times as long as I could keep the temp under 79F. Man! once I switched over, they began taking off! Some of the more dominate branches began taking over and blocking the smaller ones in record time. I had to add a couple filler lamps (1 LED & 1 CFL, both white) to even things out a bit.
NOTE: reverting back to actual Plant-to-Lamp distance (vs Screen/Net-to-Lamp).