see that we have quite contemporary ideas and experiences.
For years I have had a UV light unit consisting of 9 pcs 3W UV LEDs, I have already forgotten what the spectrum is, but it is higher than 365nm. And yes, with these diodes, the visible light is blue-violet and unpleasant.
It's logical, the human eye sees a spectrum of 380 - 760nm. At 380, that unpleasant purple starts, which turns into blue-violet, through blue to blue-turquoise, someone around 500nm.
LEDs in the extreme areas of light never emit in a narrow spectrum where they have a maximum, but they always have an overlap, even if at a lower intensity, therefore the closer UV LEDs are to 380nm, the more they glow in purple or blue.
Here I would like to remind you that white light, i.e. white, is created by mixing the entire visible spectrum.
That's why I was struck by the fact that the 365-370nm LED is unmistakably white. The white one I see with my eye is not a matter of the camera.
I took the photo only after I was "scared" by the white light from the LED.
It is somewhat difficult to estimate the intensity of the white, but if the LED in the photo consumes 6W, then the same white intensity can be achieved with a LED flashlight with a 1W cold white LED.
I took the photo with my mobile phone, but I would say that it quite realistically describes what I saw with my eyes.I also have a digital SLR camera with classic lenses and quite expensive UV filters for them, but I have these toys in the second house
My first reaction was something like a Chinese bastard sent a cheap LED somewhere around 400nm, they cost around $6 even in 20W, 365nm $20. After we calmed down, he wrote a question on edaboard.
I did some searching today and found this.
It's directly from the seller's website of that LED, 365nm really looks like the most white and beats the LED closer to 400nm the more the light is through violet to blue.
Conclusion, I still find it strange, but I have calmed down a bit and will leave the Chinese man alone for now. I'll probably try to expose the UV dry foil and see the result.