Whats up with my TOKAY!!!
I've read that the UVB bulbs gradually stop producing the UV rays over a span of time, and should be replaced every six months or so. You can't find them in WalMart or other discount stores...at least, not that I've ever seen. They're pricey...but if you keep an eye out, you can catch them when they go on sale, either at local stores or your favorite Internet retailers.
Here is my favorite reference for beardies:
Beautiful Dragons
It has an awesome list of what to feed or not feed your dragon, as well as an excellent article about those UVB bulbs and how they should be used.
As for the heat bulb...you may have to do a little trial and error to find the right one. The best thing to do is to aim a little high and then use a light-dimmer switch to control the temps it puts out. I'm using a 75 watt basking bulb and keep the dimmer switch turned ALMOST all the way up for about 115* hot spot.
You'd also be doing yourself and your dragon a favor if you went to the hardware store and got a 24hour timer. Plug both lights into it and set it for a regular light cycle. I do 14 hour days and 10 hour nights. Some people try to follow the seasonal light patterns. They do best with a predictable and consistent light cycle...and a timer makes that very easy to keep up with.