KevH uses short wave uv to help him decide between different lead contents of Ysart weights, I don't know if it's relevant to other makers, and the short wave UV is not the sort you get with normal UV lights - you need a much more expensive and complicated sort of thing.
However, it looks as if the yellow glass used in the yellow canes might contain uranium.

They are glowing green. It might just be a lot of manganese decolourant, but I don't think that's too likely.
That might help, a little bit, with id too.
