Your link seems to be dead. But I’m not too worried about that; an ordinary person will respond to uncomfortable levels of visible light by squinting, looking away, wearing sunglasses, etc. without expert intervention.
I think I may have been unclear; I wasn’t saying “let’s not use blue light for anything” or anything like that, just giving a bit of context. It shouldn’t be so surprising that blue light can kill some microorganisms, given that it can harm humans too.
It’s not going to kill us. But high-intensity blue light will, in the long term, damage your retinas. See e.g. http://photobiology.info/Rozanowska.html .
[EDITED to fix a typo in the URL; sorry about that]
Your link seems to be dead. But I’m not too worried about that; an ordinary person will respond to uncomfortable levels of visible light by squinting, looking away, wearing sunglasses, etc. without expert intervention.
Oops! The perils of hand-transcribing URLs.
I think I may have been unclear; I wasn’t saying “let’s not use blue light for anything” or anything like that, just giving a bit of context. It shouldn’t be so surprising that blue light can kill some microorganisms, given that it can harm humans too.