Should I be concerned about UV light from my IKEA LED lamp? I have an LED lamp from IKEA very similar to "JANSJÖ" (see https://www.ikea.com/ca/en/p/jansjoe-led-usb-lamp-black-70291232/). One day, I noticed that white paper illuminated by the lamp appeared mildly violet. To me, this would indicate that there is UV-radiation coming from the lamp, that gets converted to blue and violet light through the optical whitening agent of the paper. Need I be concerned about this UV-radiation? I decided to wrap a printer paper around the lamp to further investigate this. The image shows the result of this experiment, and there is quite a lot of violet light. Of course, one would need to make a spectroscopic measurement for a more quantitative investigation, but to me, even this qualitative result looks quite concerning.

 A: I will assume that the color that I see on my computer screen is a fairly good representation of the real life color. (This is assuming that if the color in the picture would look off on your own computer screen you would not have uploaded.)
The tint that you refer to as violet is a shade of magenta.
The human color perception recognizes a color as (a shade of) magenta when in the retina both the blue sensitive and the red sensitive pigments are exited, but not the green sensitive pigments. (The actual story is several levels more subtle; this is a simplification, but for the purpose of this answer this level of information is sufficient.)
You describe that the optical whitening agent in the paper, when lit by the LED light, gives the paper the appearance of a tint that you describe as 'violet'.

I submit that that tint is in fact a shade of magenta. That would mean that the optical whitening agent emits a bit less light in the green part of the spectrum, thus giving rise to a magenta tint.
Therefore the observation of the tint of the illuminated print paper doesn't give information as to whether or not the LED light also produces UV-light.

About producing light with LED's:
An early example of using LED's was for the number display of pocket calculators. Those LED's produced red light. For many years red LED's were the only form available; the technology does not lend itself to producing short wavelength visible light.
It took decades to develop LED technology capable of emitting blue light. Once LED's could be manufactured that emit in the blue part of the spectrum there was a path to manufacture LED's that produce multiple wavelengths of light, in such a ratio that the human eye experiences the incoming light as white.
In a comment it is mentioned that nowadays germicidal (UV-producing) LED lights are manufactured.
I think it's implausible that the LED is also producing UV-light, given that it was exceedingly hard to get to LED's that emit in the blue part of the spectrum.
