Not at the time.
Unless you are planning on only using the heat lamp to maintain the cool side/ambient air temperature at 80 degrees and use the UTH to create the 90 degree basking spot there is no reason to use both a UTH and heat lamp.
UTH's must be controlled by a thermostat. Stay away from the junk sold in pet stores. Here are 3 good ones:
Budget: http://www.amazon.com/Hydrofarm-MTPR.../dp/B000NZZG3S
Mid-Range: http://www.reptilebasics.com/ranco-etc-111000-pre-wired
Best: http://spyderrobotics.com/home/products.html
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