Robo, multiple entrances?? Somebody’s going to yell at you. :-D
Actually no. Those photos where from 2007 and if you read the details, I closed the bottom entrance completely. But for the last 2 years, I have switched to 2" thick insulation board on top of the polystyrene hives with no upper opening, and no longer use/need the lights. A small lower entrance and two 1" screened vent holes in the back of the bottom board, and even small colonies keep warm enough.
I agree with Mike and believe the majority of moisture issues is do to feeding syrup. I've never had any issues with hives that haven't been fed. I also believe that a lot of dead hives that are attributed to moisture are incorrectly diagnosed. When a hive dies off, moisture sets in quickly and misleads the beekeeper. Case in point. I went through about 20 poly nucs on Saturday, all with the same configuration of a small 3/4" bottom entrance and a 1/4" vent/drain hole in the bottom. I found one dead with a very tiny cluster. The bottom was very wet and the bees and frames area around them where wet. The other 19ish where bone dry. At first glance, one would say moisture.