FINCHforum

Here's an article written by an avian vet here in Western New York, that explains some benefits and dangers of UVB light. It's written more specifically about larger birds, but I think much of then information is useful with finches as well.
http://files.meetup.com/1460986/UVLighting.pdf

Very nice article, thanks for sharing.

Thanks for sharing this, Nelissa - very interesting.