Temperatures

Ive heard cresties can be kept at room temperature. What is considered room temperature. My reptiles are in the basement, and it can get to the low -mid sixties at night. Is this ok, or would I need to keep them elsewhere?

I keep mine indoors (no basement) and their temps generally dont get colder than 68, at the very coldest even then i have never seen their digi gauge read colder than 70... according to most caresheets they recommend no colder than high 60s.. thats a bit cold IMO. Since they can be housed in fairly small enclosures, i would suggest keeping them inside, thats pretty cold