Hey ST, I've read a couple grow journals where guys have staggered the lights so that each lamp runs for two hours, then its neighbor comes on for two hours, back and forth. THis way plants get 6 hours of intense light, and 6 hours of dim light per cycle, with apparently no reduction in yield or quality. I'm emulating this design in my new op and have high hopes. Does this method perhaps curtail the depression phenomenon you mention above?