I am setting up a 125 gallon aquarium for 2 beardies and have a couple questions. As far as the basking lamp goes what is a good wattage to maintain the proper temperature? It will be set on top of the tank. Also, at the moment my tank has no screen top till I build one, could they possibly escape? The tank is 2' high, 2' deep and 4' long and the highest point they could reach is about a foot high. One more question are 4' long UVB/UVA fluorescent bulbs expensive? Could I get away with a 2 foot bulb?

Thanks!