I'd think you'd either want an RHP or a basking lamp.... But I've never used an RHP. You could do an RHP and flexwatt combo also. BTW, are you getting a northern or an indo BTS? The northerns can handle cooler temps in winter (brumation) but Indos don't brumate. I only own a Merauke (Indo species) so I don't have experience with brumation.