If you place the lamps so they're only above people's heads you can use 254nm bulbs, which are much cheaper (they're essentially standard fluorescent lights with UV-transparent glass and no phosphor). People have done this for a long time in places like TB wards, but you do need to be pretty careful about placement to ensure your 254nm UV really is only shining in the space above.
Of course the ideal method is to have the UVC light internal to your air conditioner/heater unit, which is already circulating the air, so you can blast everything passing through that with enough UVC to annihilate any and all pathogens in the air, but that requires retro-fitting to AC units and stuff.
To get equivalent protection this way you'd need to cycle your air through your HVAC much faster than you likely currently do. Which would be noisy!
I hadn't seen that study, thanks for sharing! I've added it to faruvc.org, and added a warning that people shouldn't consider 233nm LED sources as equivalent to 222nm KrCl sources.
Sorry this took me so long to fix, but it should work now! https://faruvc.org, https://www.far-uvc.org, and https://far-uvc.org should all redirect to https://www.faruvc.org.
(https://www.faruvc.org is hosted on GitHub pages, and I'd tried to use my DNS registrars redirect system to point the others there. This doesn't work, though, because it only uses HTTP. They could totally make HTTPS work, via LetsEncrypt, but they haven't. So instead I needed to point those three aliases at the same VPS that serves https://www.jefftk.com , make that VPS get the certs, and then make that VPS redirect them to the canonical site. Possibly there was a better way to do it, but this is working now.)
There are very few providers, and hardly any of them sell an off-the-shelf product. You usually can’t just buy a lamp to try it out—you have to call the company, get a consultation, and often have someone from the company come install the lamp. It’s a lot of overhead for an expensive product that most people have never heard of.
This has changed! You can buy an Aerolamp for $500. I have one for my own use, and my dance organization uses four.
1money is disproportionately held by people who are high up in the company, who I would guess are more selfish than average which means lower donations
My guess would go the other way:
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A lot of the early employees and higher-ups have EA-ish perspectives (ex: one of the Amodeis joined GWWC in 2010; the other is married to Holden Karnofsky), and I'd expect this fraction to decrease as you get into more recent employees.
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Each additional dollar you have gives a decreasing impact via improving your lifestyle. I've become substantially less selfish percentage-wise as my net worth has increased.
I don't know much about hypochlorous acid fogging; it sounds like it would be corrosive, and probably at least somewhat bad for people?
For air pollution yes, but far-UVC should still work on mold.
Glycol vapors are generally going to be cheaper, but they're less far along. There isn't a product you can buy that will maintain your space at the right concentration. The closest you can get would be Bleu Garde (formerly Grignard Pure) but they're not actually selling their product.
I do think that's a good idea, yes:
It sounds like it was UV-A ("blacklight"): "Yuga carried out the investigation with Jack Morton Worldwide, the event agency that produced this year’s ApeFest. Together, they 'determined that UV-A emitting lights installed in one corner of the event was likely the cause of the reported issues related to attendees’ eyes and skin.'" This would have been visible as a deep purple glow that makes things fluoresce, so the problem is probably not that attendees didn't know UV-A was present but instead that attendees should be able to trust organizers to keep things like this to a safe level and the organizers didn't do that.