The mega ray serises is a great bulb but unless your going to use the 60wat with and exterior balister u'll have yo wait till you get a bigger cage. These bulbs are no joke they have to be a min hight of 12" from the animal any closer and it could give ur tegu a too high does of UV. In and adult tank they are perfect though becuase u dont have to do the Florecent light and a heat light its all one.