Note this preprint is now published: https://www.nature.com/articles/s41586-025-09257-8
Can't wait to have even more signs and appliances beaming harsh, blurry, possibly dangerous blue light directly into my eyeballs.
If you look at the figures provided in the link, you will see that the intensity of the light below 400nm is far lower than anything else that is available.
These are also able to operate for far longer without degrading as opposed to some of the current compromises which use diodes that blast out UV and are then mitigated with flim or a bulb that filters it out.
My impression has been that even visible far-blue is a problem.
But I also just don't like blue LEDs.