I would just go with a regular 100 watt basking bulb from the pet store. Beardies like it nice and toasty! With hatchlings you may want to provide some heat at night time with a red bulb, maybe 75 watts.

You want your hot spot where they can bask to be 105-110.

What is your set up like, cage size, decor, substrate, etc..?

Young beardies should not be housed on loose substrate, paper towels or shelf liner works best.

They should be able to get within about 6 inches of the basking and UVB bulbs.