If we could have a little more information, that would be helpful. First of all, welcome to the forum. Glad to see new people around here, always!
I have never kept bearded dragons myself but other members on the forum have. Most of the adult beardeds I see at shows are about the length of a person's forearm, not counting the tail. So we're looking at about 15 to 24 inches in length.
They need UV light to bask in. UV light is usually a fluorescent bulb. There are "regular" light bulbs at the pet store that advertise themselves as being uv, but I believe they are not adequate. Most of them are just heat lamps. The basking spot needs to be pretty hot--like 90 degrees F or so. Their diet should consist of a variety of greens, calcium supplementation, and insects. Remember that they cannot absorb calcium with vitamin D3 in it without a UV light!
Are they crowding each other? What size is the cage? For two beardeds I would think you need at least a 75 gallon tank's worth of space (remember ground space is more important than height, though they will climb to bask).