Quote Originally Posted by Prodaytrader
Yea, I kind of have to rule it out too, but I went ahead and hung a cheap heater in the room as well. It turns out that they small ceramic heaters everyone is selling has a thermostat built onto the front of the unit so you can dial in a temp that you wait it to turn on at. So I pretty much set it to come on when temps get below 60. However, it doesn't seem to make a difference at all.

I think the issue is humidity to be honest and perhaps its a combination of humidity and the cold. I can see how a high humidity could cause the leaves to get damp and then when them temps drop, the leaves go crazy. Just a thought, but the plants are getting better.
I live in a semi-arid climate at about 5100 feet elevation, so humidity is the least of my worries, but my flowering room has gotten down to about 59 degrees, and no ill effects so far that I can tell. Of course as the temp goes down, the relative humidity goes up with the decrease in temp overnight, so I would get a thermometer with a hygrometer with a minimum/maximum function so you can see where it actually got to overnight. Good luck.