Thanks for the responce!!

I did buy a UV meter 280-320 nm it seemed to me to be the only way to be sure of how much UVB especially with the issues of the chineese bulbs people are having. I was hoping for a specfic amount of UVB for a beardie.

the concern
http://www.uvguide.co.uk/phototherapyphosphor.htm
the meter
http://www.solarmeter.com/model62.html