#germicidal uv light

[viralarcadian]

bunch of bag holders- i mean "bored apes" held an exclusive event in hong kong this past week and bc the organizers used the wrong type of UV lamps a bunch of them have serious eye and skin damage

[dramatic-dolphin]

this is kind of misleadingly phrased, so just to be clear: UV-C exposure is very painful and can cause vision loss, but it's temporary! no one's getting permanently blinded here.

it's basically like getting a sunburn in your eye, which is incredibly uncomfortable and painful, but heals on its own. the only way it can permanently blind people is if it happens repeatedly over time.

[uvhealsafeairs-blog]

Best Air Purifier | Portable Air Purifier | Air Purifier for Home

UVHeal Safeair is one of the leading manufacturer company in India of Ultraviolet Germicidal Irradiation systems for air purification systems. Which is mainly used in Offices, Stores, kitchens, and Office cabins also.

[covid-safer-hotties]

COVID is still a problem, and we need to do more to stop it - Published Nov 1, 2024

By Kevin Kavanagh

Prevention of COVID-19 is of utmost importance. For several years, many in our society largely based their COVID recommendations on a one infection and done strategy. We now know that many are coming down with multiple bouts of the disease. We were told that severe outcomes were hospitalization and death, otherwise you had a mild disease. Now we are faced with crippling long COVID which has ravaged many in our society. In the United Kingdom, long COVID affects as many as 33.6% of healthcare workers. At the same time, we were assured our children are safe, they will almost never get severely sick from the virus. However, we started seeing long-term effects from COVID-19 in some of the children we know, and hoped they were outliers. Some of us even believed that children could not spread the infection.

These beliefs, many of which were perpetuated by some of our leaders, have placed our children in peril. It is almost impossible to find a vaccine for very young children due to lack of demand and far too few settings frequented by our children have instituted COVID mitigation strategies, such as clean air.

The gravity of this situation has been driven home by a recent NIH study which found that “20% of kids (ages 6-11) and 14% of teens met (the) researchers’ threshold for long COVID.” And our children keep becoming reinfected which increases their risk of severe damage. Damage which can affect the brain, cause heart/lung disease, diabetes and lower one’s ability to fight infections. Viral persistence, as can be seen in mononucleosis, herpes and AIDS. Evidence is emerging that this may be taking place in 43% of adult patients who have long COVID with heart, lung, musculoskeletal, or neurological symptoms.

Children less than 6 months of age are at a particularly high risk for severe COVID-19, but can be protected by maternal vaccination, allowing transplacental transfer of antibodies.

Similar to other respiratory spread diseases, children are germ magnets. In Sweden, 70% of non-healthcare COVID-19 outbreaks were associated with elementary, grammar, or nursery schools. A study from Boston’s Children’s hospital also found that 70% of household COVID transmissions started with a child.

Childhood vaccinations can help. COVID vaccinations have been observed to cut childhood COVID-19 hospitalizations in half. And research has found that vaccinations can decrease the chances of a child developing long COVID by 35 to 42%. And yes, vaccinations are not free of complications, but they are a much better plan than getting the disease.

Clean air in school buildings supplemented with HEPA filtration and UV-C germicidal lighting is a first step. Keeping children home when sick is also important as is being up to date with childhood vaccinations, including COVID-19. Other steps may involve changing the school year, so breaks are scheduled during the peaks of respiratory diseases. And to be tolerant of masking. Masks have been shown to decrease the spread of diseases in schools in multiple studies, and their banning, as proposed this fall in the city of Louisville, places all at risk.

[tzifron]

May 31, 2024

LP: What’s the cost of a device for measuring CO2? Is there an easily affordable device?

PA: Absolutely. You can get a $50 device that shows the CO2 concentration in a room. Every classroom should have this, and every office, every workplace. There are a couple of other things they should be doing, too. They can augment it with filtration with MERV 13 filters. If you can’t do it in the building’s HVAC infrastructure, you can make portable ones for about $60 [See Corsi Rosenthal Boxes]. The other thing that is super important and super powerful, probably the best thing we could do, is what are called germicidal UV lamps. If you set those up in a room, it’s equivalent to about 24 air exchanges per hour. So they’re even better than ventilation and filtering.

I should point out that there are, in fact, places that have installed all of these: fresh air, filtering, and germicidal UV lights. Do you know where they are?

LP: Where?

PA: The White House, Congress, Number 10 Downing, Parliament, the Reichstag, and WHO. All of our leaders have these protections and procedures in place.

LP: But not our schoolchildren.

PA: Well, the school where [former CDC director] Rochelle Walensky’s children go, they have these upgrades.

LP: But your average public school, not so much, I’m assuming.

PA: No. Part of the problem was that while the schools were given the money to do these things, but because the WHO and the CDC were not open about the airborne nature of the virus, they spent it on things that didn’t help, like surface cleansing, plexiglass shields, and gloves instead of on air quality improvement.

[roaringup]

There is a type of old glass called “sun-purpled” that was transparent when manufactured but has gradually turned purple over years of exposure to UV rays. It’s a chemical reaction from manganese in the glass. I first learned about this when looking at some antique purple windows in Beacon Hill in Boston (fancy neighborhood full of picturesque brick row houses)—there was a plaque explaining the phenomenon nearby.

I was reading something about sun-purpled glass today and learned that collectors and historians have strong feelings about the practice of people putting old glass under lamps to cause swift artificial purple-ization:

“There is a dilemma in the world of Early American Pattern Glass that needs addressing. It is the widespread practice, in the southwestern United States, of exposing EAPG to a germicidal black light for a few weeks or directly to the sun for an extended period of time thus turning the glass artificially purple. The merchandising MO is to buy old glass, do the exposure thing, take the pieces that turn a pukey light purple (some flint won’t turn), hike up the price, write a little purple flyer with a charming story about how the sun, over the past hundred years has reacted with a chemical, ‘magnesium’ (sic), in the glass and created this glorious purple antique.”

The scandal! Truly there are millions of tiny specific dramas in every corner of every single discipline, hobby, fandom, subculture, etc.

[learnwithmearticles]

GUV

Can GUV revolutionize the world of public health?

Germicidal ultraviolet (GUV) is a range of light wavelengths capable of killing pathogens. Recent research indicates that implementing GUV in public spaces could reduce the transmission of respiratory viruses by 30% to 75% - a wide range but, overall, effective, especially with the many potential benefits.

Benefits

As ultraviolet light, GUV works through radiation; therefore, it is unintrusive and passive.

At the height of the COVID-19 pandemic, a significant portion of adults in the U.S.A. did not wear masks to reduce the spread of the virus. This resulted in many deaths and an acceleration of the virus’s mutation process. GUV does not require any action from the individual, reducing the harmful effects of disinformation and ignorance.

The COVID-19 pandemic also endured a period of rationing personal protective equipment (PPE), which increased health risks to medical personnel and patients around the world. Researchers have found GUV to be effective in killing the coronavirus and making PPE resusable.

GUV can also be used in addition to PPE to increase the sterility of medical rooms. In a study of a burn intensive care unit, GUV implementation led to an 89% decrease in airborne bacteria and a 69% decrease in surface-borne bacteria.

GUV targets a wide range of pathogens, both bacterial and viral, such as the multiple iterations of coronaviruses. Through mutation, many bacteria become drug resistant. By damaging nucleic acids, cellular building blocks, GUV is effective on even drug-resistant pathogens.

The ‘passive action’ of GUV makes it ideal for handling pandemics. While other interventions require development time, societal response, and ongoing maintenance when a new pathogen is identified, GUV can continually work in the background without continued interference.

This comes on the condition, of course, that we figure out a healthy way to use GUV.

Types of GUV

Because ultraviolet light can also have negative health effects, different forms of GUV are being studied for effectiveness and potential harm. The primary three investigated are full-room systems, upper-room systems, and in-duct systems.

Full-room GUV 

A straightforward name, full-room GUV has UV-C lights on a ceiling or wall irradiating an entire room. When the room is unoccupied, this is an easy way to make the room safer from pathogens. This study gives the example of a surgery room after the surgeons and patient have left.

This variety does not work when the room is occupied. Continuous exposure to UV-C lights is harmful to the skin and eyes, making full-room GUV limited in its potential use.

Within this variety, far-UVC light might be the solution. The wavelength of far-UVC light can deactivate bacteria and viruses but cannot pass far enough into skin and eyes to cause damage.

Upper-room GUV

Upper-room GUV is also a complicated option. It sticks to the upper sections of a room, and thus doesn’t expose human skin to UV light. This also means it is less effective, because it isn’t targeting the areas of the room where transmission occurs.

Perhaps with additional airflow that directs airborne pathogens upwards, this method could be more effective.

In-duct GUV

Due to its removal from main occupied areas, in-duct GUV permits the use of stronger UV wavelengths against pathogens. This variety also requires good airflow and is even farther from transmission areas. It is considered inferior to the above two varieties. 

Researchers are continuing to investigate the most effective and safe forms of GUV. Being able to widely implement this anti-bacterial and anti-viral strategy could immensely benefit public health and decrease the spread of an abundance of ailments. It could be useful in many ways in hospitals, doctors’ offices, and many public spaces as an unobtrusive aid.

Additional Resources

1. GUV in  Medical Centers 

2. GUV for a Pandemic

3. Founders Pledge Study

4. GUV on PPE

5. GUV Overview

[centralacwarehouse]

Germicidal UV-C Light for Central Ducted Indoor Units in Centralacwarehouse.com

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LINK: https://www.centralacwarehouse.com/category/gresham-city-central-air-conditioner-heat-pump-gas-furnace-package-unit-supplier

[mit]

Germicidal UV lights could be producing indoor air pollutants, study finds

While useful for killing pathogens including SARS-CoV-2, the lights may cause unwanted chemical reactions and should be used with ventilation, researchers say.

David Chandler | MIT News

Many efforts to reduce transmission of diseases like Covid-19 and the flu have focused on measures such as masking and isolation, but another useful approach is reducing the load of airborne pathogens through filtration or germicidal ultraviolet light. Conventional UV sources can be harmful to eyes and skin, but newer sources that emit at a different wavelength, 222 nanometers, are considered safe.

However, new research from MIT shows that these UV lights can produce potentially harmful compounds in indoor spaces. While the researchers emphasize that this doesn’t mean the new UV lights should be avoided entirely, they do say the research suggests it is important that the lights have the right strength for a given indoor situation, and that they are used along with appropriate ventilation.

The findings are reported in the journal Environmental Science and Technology, in a paper by recent MIT postdoc Victoria Barber, doctoral student Matthew Goss, Professor Jesse Kroll, and six others at MIT, Aerodyne Research, and Harvard University.

While Kroll and his team usually work on issues of outdoor air pollution, during the pandemic they became increasingly interested in indoor air quality. Usually, little photochemical reactivity happens indoors, unlike outdoors, where the air is constantly exposed to sunlight. But with the use of devices to clean indoor air using chemical methods or UV light, “all of a sudden some of this oxidation is brought indoors,” triggering a potential cascade of reactions, Kroll says.

Initially, the UV light interacts with oxygen in the air to form ozone, which is itself a health risk. “But also, once you make ozone, there’s a possibility for all these other oxidation reactions,” Kroll says. For example, the UV can interact with the ozone to produce compounds called OH radicals, which are also powerful oxidizers.

Barber, who is now an assistant professor at the University of California at Los Angeles, adds, “If you have volatile organic compounds in the environment, which you do basically in all indoor environments, then these oxidants react with them and you make these oxidized volatile organic compounds, which in some cases turn out to be more harmful to human health than their unoxidized precursors.” The process also leads to the formation of secondary organic aerosols, she says. “Again, this stuff is harmful to breathe, so having it in your indoor environment is not ideal.”

The formation of such compounds is particularly problematic in the indoors, Kroll says, because people spend so much of their time there, and low ventilation rates can mean these compounds could accumulate to relatively high levels.

Having studied such processes in outdoor air for years, the team had the right equipment in hand to observe these pollution-forming processes indoors directly. They carried out a series of experiments, first exposing clean air to the UV lights inside a controlled container, then adding one organic compound at a time to see how they each affected the compounds that were produced. Although further research is needed to see how these findings apply to real indoor environments, the formation of secondary products was clear. 

The devices that make use of the new UV wavelengths, called KrCl excimer lamps, are still relatively rare and expensive. They’re used in some hospital, restaurant, or commercial settings rather than in homes. But while they have sometimes been touted as a substitute for ventilation, especially in hard-to-ventilate older buildings, the new study suggests that’s not appropriate. “Our big finding was that these lights are not a replacement for ventilation, but rather a complement to it,” says Kroll, who is a professor of civil and environmental engineering, and of chemical engineering.

Some have proposed that with these devices, “maybe if you could just deactivate the viruses and bacteria indoors, you wouldn’t need to worry about ventilation as much. What we showed is that, unfortunately, that’s not necessarily the case, because when you have less ventilation, you get a buildup of these secondary products,” Kroll says.

He suggests a different approach: “There may be a sweet spot in which you’re getting the health benefits of the light, the deactivation of pathogens, but not too many of the disbenefits of the pollutant formation because you’re ventilating that out.”

The results so far are from precisely controlled lab experiments, with air contained in a Teflon bag for testing, Barber points out. “What we’re seeing in our bag is not necessarily directly comparable to what you would see in a real indoor environment,” she says, “but it does give a pretty good picture of what the chemistry is that can happen under radiation from these devices.”

Goss adds that “this work allowed us to validate a simple model that we could plug in parameters to that are more relevant to actual indoor spaces.” In the paper, they use this information “to try to apply the measurements we’ve taken to estimate what would happen in an actual indoor space.” The next step in the research will be to attempt follow-up studies taking measurements in real-world indoor spaces, he says.

“We’ve shown that these are a potential concern,” Kroll says. “But in order to understand what the full real-world implications are, we need to take measurements in real indoor environments.”

“These 222-nanometer radiation devices are being deployed in bathrooms, classrooms, and conference rooms without a full accounting of the potential benefits and/or harm associate with their operation,” says Dustin Poppendieck, a research scientist at the National Institute for Standards and Technology, who was not associated with this study. “This work lays the foundation for a proper quantification of potential negative health impacts of these devices. It is important this process is completed prior to relying on the technology to help prevent the next pandemic.”

The work was supported by the National Science Foundation, the Harvard Global Institute, and an NIEHS Toxicology Training Grant.

[gothseparatist]

Conditions of the Ninth House

Ok I was just joking around that "It's a good thing the Ninth are the bone necros because they probably all have rickets being on Pluto" but then I wondered, would they?? how weak is their daylight?

Bunch of back of the envelope calculations and ruminations under the cut but the tl;dr is that brightest day Harrow would've experienced prior to Canaan House was darker than that of a typical grocery store interior

--

They aren't under a planetary atmosphere and I'm no physicist but I think light is light in a vacuum, some UV would reach that far just as some visible light does and due to them being partially a space station basically they are going to be under radiation we aren't.

Measurements for Solar radiation (W/m^2) on Earth are 1,413 at max and 1,321 at min. For Pluto due to its highly eccentric orbit it is much more extreme at 1.55 and 0.57. Compare this with Neptune which is 1.54 max and 1.47 min. Using the above and the value of 98,000 lux (a unit for brightness) for noon on Earth, I did some quick calculations that put noon on Pluto to vary between 114 lux to 42 lux (again due to its substantial orbital eccentricity). Putting that in comparable terms: average living room in Australia in 1998 was apparently 50 lux. Sunrise and sunset on Earth is ~400 lux. The dark limit of civil twilight (most can still read) is 3.4 lux. Night of fullmoon is 0.05-0.3 lux. Recommended office lighting is 320-500 lux.

With the above in mind, natural light reaching Drearburh at its brightest is comparable to a typical living room. And Pluto's rotation is 6.4 Earth days so the changes in natural lighting would be much more gradual than what Harrow would've experienced in Canaan house. It must have been quite the sensory overload + chaos for her!

Now for UV!

As far as UV goes, only Pluto readings I can find are in Rayleighs and I am too lazy to convert them [also yes I believe this is reflected off Pluto but it does not matter for our purposes as that is some of the light they'd be getting hit with] not many crafts have been to Pluto lol

So I'm just gonna go off a common value based on distance that Pluto receives roughly 1/1600 of the light we do. Thus, its UV will be 1/1600 of the UV on the ISS (Drearburh is under artificial atmosphere but it is unclear what filtering it does in terms of UV so I'm mostly ignoring that). Earth 's atmosphere filters out basically all UV-C (germicidal really intense one) and about 90% or more of UV-B (the sunburn one).

Unfiltered sunlight composition is about 10% UV so 10% of those earlier solar radiation measurements of 1.55 and 0.57 W/m^2 is UV. This gives us the convenient calculation to 0.155 and 0.057 W/m^2 in the UV spectrum.

For some reason it was impossible for me to find simple measurements of UV in W/m^2 lol (everything was already adjusted to different units). BUT I was able to pull up a few studies that had those as raw data for entirely different thing and most helpful was one in Kuwait where UVB was 0.25 W/m^2 or this map where it is in mW/m^2 (so 200 = 0.2).

In terms of UV, this would put the Ninth House within the range of Southern England during its perihelion and to Scandinavia during its aphelion so yes it is in fact Rickets City.

perihelion = closest to sun; aphelion= furthest

It is likely the house makes use of UV-producing lamps for its population especially given the major malnutrition issues and that the founding population included at the very least some people of Maori descent, potentially other ethnic groups with often brown skin, and people with darker skin can be more susceptible to low Vit D in low UV environments since their melanin is blocking what precious little UV they are getting. John made many oversights e.g. he's able-bodied so the houses lack automated doors, but given his background I'd imagine he'd catch onto this at least. I believe there are mentions of arc lamps in the text and these can let off some UV so there's some textual support to this idea. However, I do imagine they still rely heavily on necromancy to heal rickets just as they do other conditions. [Also normally, I'd say "realistically" after 10k years they'd likely have lost a lot of their melanin responsivity as that has happened quite quickly in humans (Cheddar Man vs modern white brits or Ashkenazi Jews vs Mizrahi ones) but the Ninth House is a much more stable environment than European history LOL, like people are provided their food and there's no war at home, etc so the "use it or lose it" selection pressure isn't as relevant as it would be for cave animals. But also "realistically" doesn't matter anyways for a bunch of reasons and the Houses clearly engage in some genetic meddling anyway (Ianthe and Coronabeth's Alexandria's Genesis asses have violet eyes).]

Lastly, the height of no-one-else-gives-a-shit-Avery, but the low light also has major implications for their crop production. "Low light" houseplants [University of Melbourne] have lux within "270 to 807". The Ninth likely has to be using either additional lights for their snowleeks and/or they are channeling a lot of light into a mirror/reflector and beaming it over the growing area. The latter makes the most sense to me.. though given how dark it is they probably should've just GMO'd some lower water column algae

[fridgewaterfiltermelbourne]

Change Fridge Water Filters in Australia: Improve Quality & Performance!

Health experts advise installing compatible fridge water filters in Australia to ensure clean and safe drinking water directly from the refrigerator.

These filters eliminate pollutants like silt, chlorine, and other toxins, resulting in fresh-tasting water for drinking, cooking, and producing ice.

A UV water filter in Melbourne has a wide range of applications in both home and business spaces. Trusted water filtration device vendors offer high-quality UV-technology water purifiers that are ecologically friendly because they do not utilize chemicals or emit toxic byproducts, making them a safe and sustainable solution for water treatment.

UV water purifiers are highly successful in eradicating hazardous bacteria, viruses, and other pathogens that may be present in water, offering a dependable and chemical-free technique for water disinfection.

They are widely utilized in residential, commercial, and industrial environments, including houses, hospitals, restaurants, and manufacturing plants.

Trusted water filter suppliers offer high-quality fridge water filters for top brands like LG, Samsung, Whirlpool, and Maytag. These filters are popular in homes, offices, and commercial settings, providing clean and refreshing water for daily use.

They provide top-quality appliances that require less maintenance, with no need for frequent filter replacements or complicated processes.

The UV method is an effective instrument for assuring safe and clean drinking water. These suppliers provide premium UV filters that are built with specialized UV lamps and emit a specific wavelength of 254 nanometers known as the germicidal spectrum of UV light. This wavelength can damage the DNA of bacteria and other microbes, preventing them from functioning or reproducing.

These UV water purifiers give an extra layer of protection against these hazardous germs, to guarantee the water people drink, prepare meals, and use is safe and clean.

Meanwhile, find a recognized water filter supplier through detailed research. Check their market reputation, and whether they maintain communication transparency, competitive pricing, and reliable customer support.

Finally, contact them for a consultation to buy your need to prevent waterborne infections and maintain overall well-being.  

Source

[ecotemphvac]

Improve the air quality in your Palatine home with Eco Temp HVAC's UV Germicidal Lights. These advanced lights eliminate viruses, mold, and bacteria, enhancing the efficiency of your HVAC system. Experience cleaner, fresher air, reduced odors, and low maintenance. Breathe easier...

[molsons112000]

So inside urinals and toilets, they can Place u v c lights to sterilize the water and the waste pee and poop... They could use this for kitty, litter boxes, and dog litter boxes....

They should use a slight in the food service industry. As well as the food processing industry...

In general, UV-C is used to sterilize water and food surfaces, whereas UV-A and UV-B are effective for sterilizing dry surfaces. UV-C, which has a shorter wavelength, has a higher light energy level than UV-B and UV-A; therefore, it is widely used for water or liquid food sterilization [19, 20].

https://www.ncbi.nlm.nih.gov

Impact of UV-C Irradiation on Bacterial Disinfection in ... - NCBI

Ultraviolet (UV) light disinfection is a water treatment system that uses UV light to remove most microbiological contamination from water. UV light is part of natural sunlight and is effective against all viruses, bacteria, and protozoa. The process works by exposing microbes in the water to a specific wavelength of UV light, which alters their DNA and makes them unable to replicate. The treated water is then safe for drinking, bathing, and food production. 

Here's how UV water treatment works: 

Pre-treated water enters a stainless steel chamber and flows around a UV lamp. 

The UV lamp emits a germicidal wavelength that impacts the living organisms in the water. 

The water is exposed to UV waves and the bacteria and other organisms are deactivated. 

The treated water then leaves the chamber and enters your homes water supply. 

UV disinfection systems are installed worldwide and are a recognized method for bacteria and virus removal for virtually all water treatment processes. However, there are some disadvantages to water treatment with UV light, including: 

Ineffective against dissolved solids

UV light is not effective at removing dissolved solids, such as heavy metals and minerals, from the water. 

Expensive

UV filters can be relatively expensive to purchase and operate. A residential UV system typically costs around $400 or $500. 

Electricity costs

You'll also need to consider that it's going to cost you a little bit in electricity. 

Light bulb replacement

You'll need to replace the light bulb about once per year. 

WA Health

Ultraviolet disinfection of drinking water

Jun 3, 2022

[creativeera]

How UV Disinfection Equipment Works to Reduce Germs and Bacteria

UV technology basics In order to understand how UV disinfection equipment works, it's important to first know some basics about UV technology. Ultraviolet (UV) light refers to a type of electromagnetic radiation that is just outside of the visible light spectrum. UV light can be grouped into four categories based on wavelength - UV-A, UV-B, UV-C, and Vacuum UV. Of these categories, it is UV-C light that is most effective for disinfection purposes as its shorter wavelengths between 200 and 280 nanometers are highly germicidal. When UV-C light strikes microbial cells like bacteria, viruses, molds, and other pathogens, it damages their DNA and RNA through a process called thymine dimerization. This prevents the microbes from reproducing and effectively kills them. Different microbes require different doses of UV-C light to be sufficiently inactivated, but in general UV Disinfection Equipment aims to deliver doses above 20 mJ/cm2 to achieve at least a 99.9% reduction in pathogens. The key factor is ensuring exposure of the microbes to sufficient amounts of UV-C light. Types of UV disinfection technologies There are two main types of UV technologies used in disinfection equipment - low pressure and medium pressure. Low pressure lamps emit UV light across the entire UV-C range, while medium pressure lamps produce radiation at a single wavelength of 254nm which corresponds to the peak absorption for DNA and RNA. Low pressure UV systems: These utilize low pressure mercury vapor lamps which are long and tubular in design. Due to their ability to emit broad spectrum UV light, they are well-suited for applications like air and ventilation system disinfection. The lamps have large surface areas which allow them to effectively treat air or water flows. Medium pressure UV systems: Using higher pressure mercury vapor lamps, these systems produce monochromatic 254nm UV-C light. Due to the single wavelength output, they can deliver more potent germicidal doses. Medium pressure lamps have compact designs well-suited for point-of-use applications like water disinfection. They are able to achieve higher intensities than low pressure lamps. UV disinfection in water treatment A core application of UV disinfection equipment is in water treatment, where it serves as a highly effective means to inactivate pathogens that may be present. Both low and medium pressure UV systems are widely used at municipal water treatment facilities, as well as for treating other water sources like wastewater, pools/spas, industrial process water, and more. How UV water treatment works: Water flows through a treatment chamber outfitted with UV lamps. As the water is exposed to UV-C light energy, microbes are deactivated based on the dosage level. Typical municipal water treatment may involve several UV reactors to achieve 4-log (99.99%) inactivation of viruses and 3-log (99.9%) reduction of bacteria and protozoan cysts like Cryptosporidium. Proper hydraulics, engineering, and lamp sleeve cleaning are crucial to maximize pathogen exposure. UV treatment leaves no chemical residuals and avoids the need for potentially hazardous disinfectants. UV applications for air and surface disinfection While best known for its role in water treatment, UV technology through low pressure systems in particular has many other disinfection uses. One important application is in treating air and HVAC systems to reduce airborne pathogens. Low pressure UV lamps can be incorporated into ductwork, air handlers, and upper room fixtures to continuously disinfect re-circulated air. UV disinfection equipment is also utilized for disinfecting non-porous surfaces. Through the use of portable UV wands or whole room disinfection units, any surfaces exposed to sufficient UV-C doses will be decontaminated of viruses, bacteria, mold, and more. This process is growing in popularity for disinfecting healthcare facilities, laboratories, food processing sites, and other settings where controlling surface-based infections is critical. Get more insights on UV Disinfection Equipment

About Author:

Money Singh is a seasoned content writer with over four years of experience in the market research sector. Her expertise spans various industries, including food and beverages, biotechnology, chemical and materials, defense and aerospace, consumer goods, etc. (https://www.linkedin.com/in/money-singh-590844163)

[shmreduplication]

Found a picture of the stage setup with the UV lights

The contractor who set up the lights used bulbs that emit uv-c light, which is mostly used for sterilization

I did a quick search for the bulbs and almost every result mentions sterilization or germicide, I have to assume it's impossible to purchase these, (in bulk! enough to light a stage!) without knowing that they're for killing living organisms.

Link to an article about it

So... a bunch of NFT grifters threw a party in Hong Kong this weekend and reportedly a bunch of attendees are now at risk of permanent eyesight damage because the promoters used unsafe lighting, and people are going to the ER...