I understand what the correct temperatures are supposed to be but I'm confused on one thing. The basking area is supposed to be at 90 degrees, my current setup is a UTH heater with a thermostat which maintains this temperature, but is this good enough for the "hot side" or should I still have a heat lamp of some sort? I currently have a Acu-rite on the very left side of the tank (cool side) to measure temp and humidity, temp on the cool side has never dropped below 79 or gotten higher than 81.