One bulb is Exo Terra Reptile UVB 100, the other is Exo Terra 100W Daylight basking spot. The lights are about 15 inches over the substrate. The thermometer in the back is showing 90 deg, but not in the direct light. I'm planning on a 10 hour timer for both. I was wondering if hanging the lights in the enclosure would be better or that would be too close to the substrate? Located in S. Florida if that makes a difference.