I have a hatchling ball and my temperatures are 78-85 on the cool side and between 89-91 for the basking area. I only use one heat lamp to do this because my house stays pretty warm all year round. I heard that this isnt good or something and that I should use a Under tank heater to provide belly heat in the basking spot. But 89-91 is the surface temperature in my enclosure,i use a temp gun to get this reading and a digital thermometor with a probe. is this ok?

