Ultraviolet light can kill almost all the viruses in a room. Why isn’t it everywhere?

Because the spectrum required (UV-C) to do so is harmful to humans and the environment. Putting it EVERYWHERE would cause all kinds of problems.

"X can kill gems! Why don't we use X everywhere?"

X: Thing that can kill humans too. And/or cause cancer.

See also:

• Fire

• chlorine gas

• dehydration

• Boiling water

• Radiation

"Hydroflouric Acid can kill almost all viruses in a bowl. Why aren't we eating it?"

Because it's great at killing things, including human skin. Seriously, my local gym has people practically sign their life away before letting them into a UV-A/B tanning booth. No way are you putting the even worse UV-C bulbs out in public. That's how people got their retinas fried at a crypto conference in Hong Kong last year.

cuz it literally burns your eye holes

This thread might be the worst example of "I didn't read the article, but I'll comment anyway" that I've seen.

UV light is both: A. Damaging to eyesight. B. Invisible.

You won't know how much damage you're doing to yourself until the damage has been done. This is how you give mass amounts of people eye trauma, and potentially blindness.

UV light is regularly used on HVAC systems and water purification systems.

There are systems used in hospitals that are automated which will roll into an empty room and then turn on to disinfect the room. They are usually used in hospitals but I’ve seen them used in places like China during their zero covid crackdown on public transportation.

Some transit systems in China even converted a paint booths to disinfect with UV so they could drive buses through. All of which is probably overkill as prolonged exposure to sunlight will do the same thing.

Exposure to UV light that is intense enough to kill viruses within seconds is very bad for humans. I pulled the cover off a system I was taking marketing pictures for while it was turned on. Within a thirty to sixty seconds I could feel like I was getting a sunburn on my arm that was closest to the light. I wouldn’t want to risk a direct UV system turning on while someone is sleeping and burning them. As a result most systems are indirect and rely on a combination of UV and HEPA filters to disinfect airborne viruses.

There are other ways to disinfect surfaces. Bleach or chlorine is cheap, simple and won’t harm humans. Chlorine gas can be used to kill really bad viruses like anthrax. Chlorine gas was used to disinfect the Federal buildings that had been contaminated in the 2001 anthrax attacks. Many detail shops, rental car agencies and public transit systems in the US use Chlorine gas on vehicles to disinfect or more commonly remove nasty odors from vehicles. The gas can seep into all cracks/crevices and get into the HVAC system ductwork in ways UV light can not. If you ever get into a car that faintly smells like a pool, chances are it has been gassed recently to kill an odor.

We use uv light stands in the hospital. We will shut down a room and run a uv sanitizer for a bit. It works in some instances but it's not exactly something you can just leave running all the time. Everyone would probably have a sick tan tho.. To go with their skin cancer..

Pretty counterintuitive that in order to make UV less dangerous for humans, you can make it more ionizing. Anyway, I'd expect problems with degradation/yellowing of plastics, bleaching of everything in range, and massive issues with indoor ozone and some other forms of air pollution

This is why. https://www.theverge.com/2023/11/6/23948464/bored-ape-nft-event-eye-injury-sunburn-uv-exposure

Jeez, every response in here is about it burning your eyes. Thing is, people aren't in every room all the time. Have it set to a sensor, same as the lights, and you can quickly sanitize large spaces that are unoccupied. Elevators, airplanes, etc can be sanitized the second they're empty. My FIL is a retired GE engineer working on this technology.

Because it is very dangerous and people will absolutely let their toddler play next to the lamp. This is why it's basically only used in places like hospitals where access can be controlled.

Imagine writing this headline in a universe where daylight exists rofl.

Did anyone actually read the article? The only guy whose question wasn't already answered by the article was the one about yellowed plastics, lol.

If it kills all the viruses it also kills you lol

Oof, ultraviolet light. This makes me flashback to April 2020, shortly after the U.S. shutdown for the Coronavirus pandemic.

If you have 1:57 minutes of free time, watch this video of former President Donald Trump addressing the nation on the response to the novel coronavirus.

Warning: If you experience second-hand embarassment, try not to watch Dr. Birx in the background squirm in her seat as she sits through the idiot rambling of the orange man. Immediately after this press conference, corporations and media companies pushed out critical warnings to Americans to not drink or inject disinfectants like bleach.

• YouTube link: https://youtu.be/BalDN6iGYpE
• Piped link (privacy-respecting frontend for YouTube): https://piped.video/watch?v=BalDN6iGYpE

~~Because that is specifically UV-C and it's harmful to humans too. ~~

~~for example: https://wwd.com/eye/parties/hypebeast-party-uv-lights-injuries-11036559/~~

Correction: the article is about even smaller wavelength UV which is not as harmful to humans, my bad.

Bleach kills AIDS, doesn't mean you can inject it into your bloodstream and be okay.

Because it burns you. That's the answer. It kills your skin cells and eyes the same way it kills the bacteria. Also, it is everywhere, it's fucking outside. The sun. Fucking stupid. Idiots.

Know what else kills bacteria? Bleach. So get chugging.

So stupid.

This thing kills all living things so why don't we bathe ourselves in it?

I worked for a company that made a UVC light system for sterilization. The amount of safety you have to build in so people wont nuke themselves makes them hard to use.Also, the bulbs we used were delicate and had issues constantly.

Do you want Ultraviolet resistant viruses?

This is the dumbest shit. It kills all kinds of stuff, not just bad viruses. Homes are covered in bacteria which you've adapted to and are helpful. Kind of like gut bacteria, but outside your body. Killing all of them isn't a good idea.

IIRC, they have UV sterilizers for central HVAC systems. So while it may not sterilize surfaces, it will kill all airborne pathogens.

A bit of the old Ultraviolence, eh?

Not necessarily agreeing with the article posted, but for all the people who clearly didn't read the article:

https://www.nature.com/articles/s41598-022-08462-z

That's just one paper I found searching for far-UV. Seems to be many more.

Again not saying it's 100 % safe or anything, but it looks promising.

An actually halfway decent idea might be adding a strong UV light inside the washing machine or dryer to kill germs. Modern eco methords with 30-40 C° just dont kill the germs effectively. You'd need to wash your clothes at last at 60C° which most clothes (especially sports wear) cant handle anymore. Or just dry them on the outside where we also have a Strong UV source aka. The sun.

In Macau, they have little trash garages which are flooded with UV at night

The bulbs don't last very long last time I looked into this for home use

UV light kills almost all viruses because it's ionizing EM radiation. So it also fucks humans up, xd. I mean just stay on sunlight naked for a day. Your body will be so happy. All the mutations from ionizing radiation would be great.

But yeah we life in a society where ppl is scared of Radiofrequency EM waves (non-ionizing), "dangerous cell phone towers, wifi dangerous". That same people recomends staying long periods of time with direct sunlight contact without protection (yeah we need protection because sunlight spectrum has UV and higher freq ionizing radiation).

Sunlight healthy/radio waves dangerous, that is the most stupid statement ever.

Sunlight is beneficial in small dosis because of how we syntetise vitamins (as little as i know). But remeber if you are scared of microwaves, remeber that sunlight has much more higher freq(higher energy) waves.

I always thought these were pretty cool. I'm not sure how HEV compares to UV though, or if it even works

That’s how you get UV resistant strains of all kinds of microbes

The issue with stuff that kills everything is that... Well it kills everything.

Shadows.

I could see UV light also causing plastics to oxidize and become brittle much faster, because they might not be made for that kind of exposure. So using UV light might mean having to replace a lot of plastic things too.

can it kill Tardigrades though?

This is the best summary I could come up with:

Ultraviolet retained a small coterie of enthusiasts over the ensuing decades, focused narrowly on preventing transmission of tuberculosis — which has no reliably effective vaccine for adults — in its remaining hotbeds, like homeless shelters.

The biggest test it received, the Tuberculosis Ultraviolet Shelter Study of 1997-2004, demonstrated that “upper room” UV, in which UV-emitting lamps are placed at least 6.9 feet above the floor where they can disinfect air without harming humans, was safe.

It wasn’t — detective work from scholars including Linsey Marr, Jose-Luis Jimenez, and Katherine Randall in the middle of the pandemic determined that this conclusion was based on a misinterpretation of the Wellses’ research that had somehow persisted for decades in the medical profession.

“This is the most difficult talk I’ve had to give in my career,” Jose-Luis Jimenez, a distinguished professor of chemistry at the University of Colorado, told the audience at the first International Congress on Far-UVC Science and Technology this past June.

But 2020 was also an unusually brutal year for airborne disease: 49,783 Americans died from influenza in 2019, for instance (and none from Covid); 1 percent of that number is about 500 people, which starts to feel comparable to the air pollution cost Jimenez identifies.

Jimenez favors using UV in very high-risk locations, such as hospitals, but worries that construction companies, schools, malls, and the like will seize on the potential of far-UV as an excuse not to invest in proper ventilation and filtration, leaving us with the ugly trade-off he identifies.

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You really dont want to live in a sterile environment, you actually need some stimulation to your immune and other bodily systems. Most body stuff is like muscles including the immune system - when you regularly over load and stress them, thats the impulse to stimulate growth and evolving.

There is a setting in most computer monitors and maybe televisions but depends on it, with del it’s a for sure thing that existed, but it’s controlled from a transmitter, it has to get really bad and be the last stand, which it’s getting there. All it does is emit uv c radiation in certain amounts it’s too make sure that it’s an actual person or an animal using the computer. Parasites do weird types of stalking and crazy amounts of conspiracies through stolen computers or computers at places that are left on and it unlocked. They’ll even install software and then sit in some random closet or place using the computer making websites or duplicating things that get sold. It’s weird we assumed they all just used one host.

The uv c light kills the parasite and or bacteria/virus that’s in a human form using the computer. An actual person won’t die from it (a virus or bacteria immediately dies or it severely damages them and it isn’t fixable) possibly even suffer vision loss, I could never stand extremely bright lights until experiencing the radiation I think I had an old dell latitude computer that emitted uv c in small amounts. But noticed that over the years I had trouble keeping my eyes open and couldn’t stand being outside, I used IGF and mgf in my eyes through eye drops 2 mcg a ml, to try and help my blurry vision which I assumed was caused by my eye lashes or could gunk build up in the eye. Eye drops help and did improve vision, my vision got bad but sometimes was like it wasn’t bad but didn’t know what from. Maybe high co2 levels or chemicals in the air. There is hgh for vision issues, that’s what regular doctors used for it. The same amount can cure hairloss just not sure about jintropin curing it. The methionine is important or the most important thing, but it may not be true or just requires more or longer time period to regrow. Ultra violet radiation may also cause hair to grow instead of fall out, male pattern baldness may just be a yeast infection and hair may also fall out from certain steroids but it doesn’t stop it from regrowing.

I slept great and felt very relaxed after the uv c couple second burn into the cornea or staring at the bulb directly or into it for a couple seconds and feeling the zap. It didn’t hurt but was like an electrical sizzle short out followed by feeling great and free.

But these are high strength made for sanitizing a room or probably hundreds of feet, but ultraviolet radiation could travel miles, it doesn’t stop it keeps bouncing off things, but the rays spread out as they move away from the light bulb.

They just may notice their overall sensation of the atmosphere or the world around them changes when the radiation hits their skin or eyes, not sure which. I wonder if daylight LED light bulbs emit small levels of uv c. Probably not but they could. Sometimes uv bulbs were the only white LED bulb that existed, they were on little microscope loupes and things.

At first I didn’t get into them because my skin was red only under the 6000 kelvin daylight bulb.

Well there use to only be disease below the grass because chlorine was the ozone layer and god publicly added it to the earths atmosphere to change the way life was with the population. Disease was also something different that was added. So how does god do this implementing thing with all these conspiracies going on with economics. This was just his world, everything could have been a hamster in a glass box or cage. The natural world or religious world did not have to exist. Things like radiation change everything and same with animals turning, changing, evolving, or magically turning into people. At one point it was weirder than Skyrim and mid evil and everyone was naked within the last 30 years drinking bacteria infested well water. Wells were no good without filtration or heating, but it’s not that bad. Wells are usually all the way to bedrock but may lack ions from moving water like rapids or waterfalls.

To produce uv radiation you can use chlorine, iodine (heating it to 250 or higher will form a gas and emit radiation, it feels wonderful, condense back into metal when it cools), bromine, maybe even other things.

That’s what hydrogen iodine gas is for, but hasn’t been done yet, or they mix it with plastic with everything becoming LED, basically you can chlorinate or attach whatever element you choose, to the plastic molecules as bonds and then melt it down to form the LED bulbs with a filament. But closer to the filament is better seeing how the bulb itself only gets to 150 maybe 200 degrees if left on for long periods of time.

Mercury may not actually produce ultraviolet radiation at all but it could emit some type of rays.

Uv c is just higher strength uv b, there is more chlorine in the bulb or it is heated to a higher temperature. The actual light itself as in photons or electrons don’t matter besides heat that is produced by the filament.

You can also heat the events without producing light and uv radiation is emitted. If you get hit with high enough strength you can turn entirely black over a few days or weeks, even if it’s just for a few seconds. It’s called evolution.

And that’s all Japan cares about first, is sanitation, or at all, sanitation makes everyone feel good but cleaning and eating large amounts did t always go on, there was less poop and people and animals usually visit or live by waves and moving water.

Because disease walks around as a person and is all the government, police, and banks. Even the jury and consumers here in fast food land, why does no one kill them all and live here. There’s natural food, processed food, jobs, cigarettes, booze, pharmacies, clothing, internet, addresses, electronic stores, knock off stores, bong stores, strip clubs, casinos, and now there’s weed stores. Hospitals what do you mean Japan was like a hospital itself. All anyone did was health stuff preparing for sexual things, and some drug use, but cigarette smoking ruined it. They got that mad about it, and probably alcohol, someone must have faked drug laws existing. Somehow there’s some election system or court that ruins it all. Oh well we all behave and lay in bed like we were supposed to with these TVs

Oh yes and there’s disease added to the food/drinks to brainwash everyone into the parasite economics thing that’s them stealing and embezzling everything and acting with it. But nothing could go on without sanitation or narcotic use, these things wanted occupy someone’s brain and seek attention 24 hours a day in the same house as them.

We’d have to starve ourself while working or finding a job but everyone was self employed, celebrities, and or business owners, stock holders. Maybe shareholders didn’t have these issues. There may have been uv c light bulbs in public schools or outdoor street posts which is why they worked so well at pulling everyone’s mind out of disease banking systems, where the disease didn’t even start it. They were just on the money as in a virus or bacteria physically on it, and they were on cards that come in the mail with that as a way to track you. Seems terrible but it for sure ended identity theft and credit card fraud.

Because my curtains are closed

Why not inject UV as a cure for all virus infections!

This way it wont reach our eyes or skin so no problems!

I'd like to know which 12 users upvoted this so that I can block them all.