I would get a heating pad AND a red night bulb or CHE. Make sure you have the heating pad on either a thermostat or a rhetostat. A rhetostat is like 10 bucks, but you have to monitor the temps several times a day. A thermostat is pricey (80-200 dollars), but once set to the right temp, you can simply leave it.

I know people will vehemently disagree with me on this, but my personal opinion about humidity is that if a humid hide is provided for shedding and there is always water, I havent found it all that important.