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.
Hank had announced this one, nice that he has them for sale now. The led looks similar to the 3535led in the Uniquefire 602C-uv (Fasttech, dx, also in Uniquefire S10 host), it will work well to produce a nice beam.
The price is firm though, a bit too much for me to buy it for playing around for now.
I was going to offer to buy a few for you to test but you beat me to the punch. Honest!
Regardless, looking forward to your results. Certainly beats the LED Engin options I've been looking at from a price perspective. Especially keen to see how well these work with Carclo triple optics.
Concerning the Carclo optic, 365nm light and PMMA don't work well together, for my Ledengin 365nm zoomie I had to buy a glass aspheric lens because the plastic one transmitted only a small portion of the uv.
I noticed a discrepancy on the Nichia 119 style pads, like some have 0.5mm distance between the pads, some have 0.8mm depending on the LED model can also have other small different details.
The international outdoor price is fair. Bought from a distributor on Alibaba the price is $15 each if you buy 10 or $9.50 if you buy 12 or more plus shipping and that is for a bare emitter. So mounted on a Noctigon for $15 a piece is not bad.