You may need to get a higher wattage basking bulb to make up for colder indoor temperatures, but you have to just watch and see. If you keep the heater on then you may not need to make it hotter in the cage. You don't need a heat source at night unless it gets less than 60 F. And if it does then you can use a ceramic heat emitter instead of a night light so there is still complete darkness. Or you can heat the whole room with a space heater. I gradually shorten my light cycle to 10.5 hours of daylight in the winter to try to simulate seasons, but lots of people don't change their light cycle and their chams do just fine.
