Hi Jane,
We used Vizilite for the last 2 years, but felt that VELscope gives us a higher level confidence. I have some of the technical information at my office and answers to many of the questions about the differences, there, too.
Since I work late tomorrow night, I'll try to get back to you before I go to sleep when I get home.
I know that Colleen was able to find the names of dentists using the light by calling them. The phone number is on their site. Unfortunately, there still are not a great many out there yet, but I believe they are selling a lot of them.
Jerry