I have one for mine. Granted I am not knowledgeable in this respect at all (still total newb) but my plan is to switch out the UV bulb for a regular bulb when it gets cold (so right now, I should probably do that...) but this will help simulate summer/winter cycles, and possibly contribute to froggies well being? My thought is no, however, it is not necessary, but since they live in more or less tropical environment, it can't hurt, and won't be any different than what they would have in nature. If I'm wrong, I'm hoping someone on here will correct me!