I have a wooden enclosure and I find that a heat lamp mounted in the top (left or right; your preference) with a heat guard around it is sufficient. It easily maintains a hotspot of 90 degrees, with a cool end of 79 most of the time. Humidity is easily maintained too. Wooden enclosures [vivariums] are good because wood isn't a good conductor of heat, so the heat lamp doesn't have a hard time.
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