There has to be some conclusions we could draw from your experience, like why did you get MORE growth in the last 3 months than before? Possibly the saying that "reducing your light schedule makes your corals grow a lot more" is actually true? I have seen people say that for years now.. like switching your MH from 8 hours to 6 hours a day will INCREASE growth but not enough evidence to convince me it worked.. but look at your tank.. the less PAR it gets as the winter months hit, the MORE your corals seem to grow to a point. Some type of stress the reduced lighting induces on the corals that makes them grow more, like making an anemone split from stressing it. You can only stress a coral so much before negative things start to happen, but maybe in nature/sunlight/seasons this is how corals are supposed to behave.. start growing/coloring up in the spring, average growth and great coloration in the summer, then fall hits and sunlight gets less and less, colors fade a tad, but growth going through the roof for a couple months.. then they stall and sit almost dormant for a few months until spring, and the process repeats. Not sure if that is how it actually works, but sounds like a good theory to me. We will have to watch closely in 2010 to see how the corals react to the seasons.