Being subject to such UV lights without my knowledge and waking up in the dead of night to my eyes burning is a new fear I'd never expect to develop. A nice reminder of how important combating negligence is.
I've always thought about it as a potential terrorist attack vector. It can be done remotely (from afar) and your target is unlikely to understand what's happening (vs. say a stabbing event). It might be because terrorist events are about spreading the terror more than the damage itself. Still, it is a worrying thought that you could be walking the metro one day and an evil person can decide to end your sight.
Like you said, terrorist attacks aren't subtle, they're designed to kill to incite a political response. This type of non-lethal but injurious approach would be more likely the work of solo psychopaths, the type that try to go undetected.
It's hard to over-state the value and importance of a good A/V crew. They'll keep your speakers from blowing up (or cancelling each other) and, apparently, protect your corneas.
> Philips TUV 30W G30 T8 light bulbs, which, according to Philip’s website, emit 12 watts of UV-C radiation, mainly used for disinfecting surfaces.
12 watts optical power is a lot. A lot more powerful than lights you need eye protection for. Even if you don't have symptoms, you shouldn't look at such a light source too often.
It probably also emits UV-A and UV-B light, even when light sources often peak at very specific wavelengths. Still, you would probably also get brown skin from that and even a few hours would be noticable.
My first guess would be to help disinfect the air. UV-C light is pretty good at killing bacteria and viruses. Though they evidently didn't realise it can also kill your corneas.
That was probably the intent. AFAIK Blacklights usually use UV-A lighting though. It should be said, that UVA-A penetrates much deeper into the skin. You won't get sunburn from it, but it still can be damaging to cells.
It was previously thought UV-A would not be damaging, as the skin doesn't seem to be as photosensitive to it compared to UV-B or UV-C radiation, which results in red or brown skin. But newer studies suggest that the danger was underestimated. The cell damage just isn't as visible.
I don't believe the usual blacklight you find in a party cellar has the intensity to cause any damage though, but you may want to ask a dermatologist. You really need to be careful with dosage of light in all these wavelengths.
He also works in events/lighting and has mentioned the risk of events inadvertently sourcing 'cool-looking' lights without understanding what they actually are (germicidal UV lights)
I do wonder about lasers, removing the protection used to reduce the cost. There were stories of blindness but they seem to have disappeared, maybe they were never true - https://www.newscientist.com/article/dn14310-party-laser-bli... (Party laser 'blinds' Russian ravers)
Philips Sterilamp® brand T8 germicidal fluorescent lamp. 30 Watts and 36" for use in germicidal sterilization applications.
Produces UVC radiation. CAUTION: can be very harmful to eyes and skin. DO NOT expose eyes or unprotected skin to these lamps. SERIOUS injury and blindness could result.
They were popular during covid. It's undecided how well they worked - DOI:10.1111/php.13418 (Fully exposed in rooms when unoccupied, also a not visible bulb always on)
That specific blindness story was debunked later on (~month past initial report); something about having only a single unnamed source touting that story to multiple newspapers.
As a russian rave goer: my deepest thanks to aliexpress providing lots of reliable UV LED sources, X-Y lasers etc. It really keeps the (insane) DIY at bay.
TL;DR: invented in Germany, 1906; introduced as a nationwide cure for rickets in German children in 1920; adopted by soviet medicide nationwide in 1950s and never really went away
As for covid, it did trigger a number of insane DIY projects involving UV light sources; I like this one in particular - https://youtu.be/nFSkBsKAH-A?si=SLgdtdvLcNN-sTs0&t=187 (yep, that's a 125W streetlight mercury vapor lamp being stripped down into a hard UV hazard.. These go as far as 1000W, though 125W variation is most common and easily obtainable, at cost of $5 per lamp, and ~$30 on spare parts to get it up and running)
Maybe some of the rhetoric as a form of identify cosplay, but the image art NFT crowd is heavily reliant on the most extreme usage of copyright laws and are often seen advocating for not merely grotesque application of digital rights management but extending the law to prevent their images from being used without payment.
yeah the art NFT crowd is its own gradient of personalities. there absolutely are many well funded collectors that do not understand what they bought and what’s supposed to be interesting about it. they actually are offended when you right click and save the image displayed by their NFT. they should be ignored.
19 comments
[ 4.5 ms ] story [ 49.7 ms ] thread12 watts optical power is a lot. A lot more powerful than lights you need eye protection for. Even if you don't have symptoms, you shouldn't look at such a light source too often.
It probably also emits UV-A and UV-B light, even when light sources often peak at very specific wavelengths. Still, you would probably also get brown skin from that and even a few hours would be noticable.
It was previously thought UV-A would not be damaging, as the skin doesn't seem to be as photosensitive to it compared to UV-B or UV-C radiation, which results in red or brown skin. But newer studies suggest that the danger was underestimated. The cell damage just isn't as visible.
I don't believe the usual blacklight you find in a party cellar has the intensity to cause any damage though, but you may want to ask a dermatologist. You really need to be careful with dosage of light in all these wavelengths.
He also works in events/lighting and has mentioned the risk of events inadvertently sourcing 'cool-looking' lights without understanding what they actually are (germicidal UV lights)
Reported specs from ApeFest here - https://www.bulbs.com/product/TUV30T8-G30T8 (Same wavelength as a SteriPEN)
They were popular during covid. It's undecided how well they worked - DOI:10.1111/php.13418 (Fully exposed in rooms when unoccupied, also a not visible bulb always on)As a russian rave goer: my deepest thanks to aliexpress providing lots of reliable UV LED sources, X-Y lasers etc. It really keeps the (insane) DIY at bay.
> they were popular during covid
They were popular long before covid: https://de.wikipedia.org/wiki/Quarzlampe
TL;DR: invented in Germany, 1906; introduced as a nationwide cure for rickets in German children in 1920; adopted by soviet medicide nationwide in 1950s and never really went away
As for covid, it did trigger a number of insane DIY projects involving UV light sources; I like this one in particular - https://youtu.be/nFSkBsKAH-A?si=SLgdtdvLcNN-sTs0&t=187 (yep, that's a 125W streetlight mercury vapor lamp being stripped down into a hard UV hazard.. These go as far as 1000W, though 125W variation is most common and easily obtainable, at cost of $5 per lamp, and ~$30 on spare parts to get it up and running)
Nice try