Er... Beardies will NOT keep eating and eating, they will stop when full. Its just some people dont want to feed them that much because of how much bugs cost. Mealworms are a huge no no, and the whole eating through your beardies tummy is a lie, not that you should feed them that anyways.
No UTH's for beardies, they just need a light basking spot set at 110 degrees. Lower than 100 can cause regurgs of the crickets. You will also need uvb.