that is actually a common debate on tegu forums. some people don't use UV because they feed mice along with other foods to their tegu. some do use UV because it can't hurt. from what i have personally witnessed, if a UV light is not provided there tend to be calcium problems that may cause twitchig or tremors that are quite noticeable and it may also lead to MBD. i use a reptisun 10.0 for my tegu.
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1.0.0 arg. b/w tegu
1.1.0 white's tree frog- popeye, jack
0.1.0 southern painted turtle- ms.tortle
0.1.0 crested gecko- crimson
1.0.0 pinto hedgehog- dante

