I'd investigate your incubator. There is no good reason down here in FL that a few hour power loss will drop temps 10F- unless you keep them in your house where ambient is 50F?
I have lost power several times for an hour or two and my incubator has never dropped temps more than a degree at most. This past Monday power was out for ~2 hours beach side from Edgewater to Palm Coast and I never lost more than 1F in my incubator.