djozz, I wonder if you are possibly seeing UV that most people can not perceive. A member here (sorry, forgot who) provided a link on the phenomenon. I believe the link was to a CPF thread. Basically, it talked about the ability of some people (especially as they age) to see UV.
I purchased some 365nm emitters from an Aliexpress vendor some time ago. It seems unrealizistic to think they really are centered around 365nm, but I think they might be. They do make objects fluoresce. They don't emit much visible light. What they do emit in the visible range appears white-ish to me. I haven't been able to find a way to verify though. I've heard that the Canadian Polymer bills are supposed to need 365nm to fluoresce, but I couldn't verify that on their website.
EDIT: I don't recall if it was speculation or fact that the ability to see UV had to do with it not being effectively filtered from entering the eye.
EDIT2: I just remembered there was a "definitive" test I saw here.
EDIT3: Searched and could not find the link. I did find my original report on the emitters here. I described the tint as neutral kind of creamy tan tint. Lenses really cut the output.