Hi all, I know you don't want to add too much heat to the coop, but I am concerned about light. My girls are noticing that we are getting less light everyday (I'm in Alaska) and a few are now only giving eggs every other day. It was recommended to put a light bulb in the coop on a timer and that heat should be enough for them should they need it, but won't be too hot. Correct? I've plugged in the water dish since there was a layer of ice on top this morning...... Winter is coming! Other suggestions? Our coldest is January when it's been down to -20 below zero, but that only lasts a few weeks.