I like quack products, but when it goes into the realm of faking medical equipment during a global pandemic they may just be scraping the bottom of the barrel.
This is a "UVC" germicidal lamp with what appear to be 395nm near-UV LEDs. It's built into a mechanic's rechargeable work light, making me wonder if it had an original intended purpose as a coolant leak finder, or if they have just repurposed the case at short notice to bang out a fake medical product. I doubt this has any germicidal action at all.
Update:- I've now tested this with a sensor capable of detecting real UVC germicidal LED wavelengths and it is definitely not germicidal. Although UVA is claimed to have a slight effect on some bacteria the most important area of the spectrum for germicidal and anti-viral activity is UVC due to its ability to interfere at an organic level. The same thing that makes some sections of the spectrum hazardous to skin and eyes.
I'm still waiting on the large COB germicidal lamp (eBay have removed that listing, so I don't know if it'll arrive or not) and have just ordered a GU10 style spotlight too. I'm fully expecting them to have standard ice-blue LEDs in them to fake the same colour as real mercury vapour germicidal tubes, which is scientific nonsense, since the reason the mercury tubes light that colour is because they have several spectral lines including visible ones and invisible ones. With LEDs a real UVC LED should be invisible unless it has a slight fluorescence or an integrated visible LED for safety.
Another update. The "60W germicidal" COB lamp has arrived and is a 30W ice-blue LED lamp with no UV at all. It also has the LEDs referenced directly to the mains supply and poses a shock hazard if touched.
There are some genuine LED based UVC wands being sold on eBay, but it should be noted that their output and longevity is a fraction of traditional mercury vapor UVC tubes.
The 18650 battery was not very generous in this light at less than 1000mAh. I guess that's reasonable for a light that won't get used too much in its original application of detecting leak tracing dye.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
This is a "UVC" germicidal lamp with what appear to be 395nm near-UV LEDs. It's built into a mechanic's rechargeable work light, making me wonder if it had an original intended purpose as a coolant leak finder, or if they have just repurposed the case at short notice to bang out a fake medical product. I doubt this has any germicidal action at all.
Update:- I've now tested this with a sensor capable of detecting real UVC germicidal LED wavelengths and it is definitely not germicidal. Although UVA is claimed to have a slight effect on some bacteria the most important area of the spectrum for germicidal and anti-viral activity is UVC due to its ability to interfere at an organic level. The same thing that makes some sections of the spectrum hazardous to skin and eyes.
I'm still waiting on the large COB germicidal lamp (eBay have removed that listing, so I don't know if it'll arrive or not) and have just ordered a GU10 style spotlight too. I'm fully expecting them to have standard ice-blue LEDs in them to fake the same colour as real mercury vapour germicidal tubes, which is scientific nonsense, since the reason the mercury tubes light that colour is because they have several spectral lines including visible ones and invisible ones. With LEDs a real UVC LED should be invisible unless it has a slight fluorescence or an integrated visible LED for safety.
Another update. The "60W germicidal" COB lamp has arrived and is a 30W ice-blue LED lamp with no UV at all. It also has the LEDs referenced directly to the mains supply and poses a shock hazard if touched.
There are some genuine LED based UVC wands being sold on eBay, but it should be noted that their output and longevity is a fraction of traditional mercury vapor UVC tubes.
The 18650 battery was not very generous in this light at less than 1000mAh. I guess that's reasonable for a light that won't get used too much in its original application of detecting leak tracing dye.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
Sooo many people….. "ohh its purple/blue so it must be UV. Sad really.
How does ebay get away with selling fake uvc and uv wands. I bought the one you showed before I saw your video tonight what a big mistake I made but I will learn from it when buying from eBay in the future. It's nice to no that you are honest about these item's sold to the public from places like eBay thank you from Sydney Australia
So basically there is no such thing as a cheap LED UV C lamp. The only ones that are real UV C are the glass gas filled tubes. Ive got 2 x 38w ones on order from ebay.. If i dont blind myself, Ill let u all know if they are any good.. 😉
Thank you for this very very useful information!!!
The problem is that you made a declaration of fake UVC without using any detection devices as you would do for components. You should validate an assumption using real science, not assumptions with a device such as a UVC meter.
NOTHING good comes from Communist Chinese factories. It's all crap with hilariously worded user manuals. Really funny actually. What Oh…
As a rule of thumb if the light isn't a Fluorescent tube it probably isn't UV-C (unless its very low output or really expensive)
Ebay doing something about deceptive, dishonest sellers..lol, and lose multi-million dollars in fees, never gonna happen
Why do they waste so much time, energy and resources to make these fake stuff is beyond me….
Here’s some interesting info about genuine UVC LEDs. This is a copy/paste of a conversation I had with some fellow electronics/photonics nerds regarding this technology. A lot of us hobbyists and professionals online, in places like the laser pointer forum LPF and budget light forum BLF, and others.
Clive, I think a cheap Spectrometer would be a cool DIY build. Like the one shown on “les’s lab YouTube channel” Not really necessary, but it would be a fun build, and I’ve seen several instances where you’ve wanted to measure the wavelength of light. Once you have a spectrometer…,you can’t imagine all of the incredible uses!
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Here is the copied info…Maybe it’ll help some folks….. and it’s just interesting stuff regardless!
All genuine UVC LEDs have a quartz/sapphire glass window and/or ceramic Gold plated body. This is necessary because UVC easily damages Plastics and other materials used in UVB and all other LEDs. Therefore if the window wasn’t quartz, it would quickly degrade and discolor.
I’ve Bought and tested close to 100 different UV LEDs over the past few years… Including deep UV (UVC) i’ve tested everything from the dirt cheap Chinese knock off‘s, to the highest end chips costing $100 or more from Nichia and other quality manufacturers. (usually as a sample or with a big discount because I can’t afford $100 for a single LED 😂)
I’m not a professional optics engineer, but I have an industrial electronics servicing business and lab… so already had the equipment. I was interested in this stuff for my own hobby and professional uses. And it was fun as hell!! UV photonics technology is super interesting, even to regular folks Who aren’t nerds.
I’ve always dabbled in optics and lasers. I spent several years putting together a professional optical “breadboard” and test bench. All dirt cheap from government and Academic auctions. It really is the golden age of science and electronics! Over $20,000 worth of optical equipment, and decommissioned military/medical/industrial lasers. Photonics and laser stuff is about the most expensive hobby there is. Besides burning money 😁 A simple mirror, lens, or optical mount can be hundreds of dollars new. no way I could’ve afforded it. But I paid pennies on the dollar! Or less. Government auctions are awesome.
There are genuine deep UV LEDs being made in China that are pretty darn cheap. $1-$2 each! Pretty low power but decent quality.
But UVC LED technology is still so new, that the output powers are exceptionally low when compared to UVB. So you need an array of about 25 LEDs to approach timely “sanitizing“ power. Which is not going to be cheap, especially if you get Nichia or other high end chips. For a 25 LED array of decent power UVC nichia LEDs… You’d be looking at over $1000 easy. And if you went with their most powerful chip, a array of 25 would be about $2500 😂
But power density will increase slowly just like it did with 365nm UV LEDs. Cost per milliwatt of “radiant flux” will go down with time.
Currently, decent cheap quality UVC LEDs average 5-15mw (Milliwatt) of optical output power. So when they sell UVC LEDs labeled as “1 watt“…. that means 1 watt of input power. You have to look closer to find the optical output power rating.
If you got 1 watt of REAL UVC optical output… That shit could fry your skin and eyeballs really fast. Even worse is that real UVC leds can be almost invisible. Which is Dangerous shit!!😂
thankfully many chips include a visible LED inside the same package. Usually 365 nm or higher UVB. As an indication light, so people don’t accidentally leave it on without knowing it… Easily burning their eyes. Or the board it’s eventually mounted on….in a finished product…. has a tiny colored LED next to the UVC led. To indicate when it’s on.
Although 100 mV is pretty much the limit for current UVC led technology…… its possible to get 1000MW (1 watt) of optical power out of 365nm UVB leds… or even more. It will be incredible if UVC LEDs reach this level of radiant flux in the next few years.
Sorry to ramble on. Hope this helps someone or you find it interesting.
If its Purple, those bugs are gonna run!!!!!
Soo much China junk out there. Also the only purple light would be a far uv light which wouldn't burn your skin
To the person reading the comments looking into these handheld uvc disinfection devices:
DO NOT buy ‘handheld’ or ‘keychain’ uvc disinfection devices. If they were effective at killing germs and bugs, then they would be effective at harming your skin and your eyes. Effective uvc disinfection devices should not be anywhere in the line of sight (or reflection) of anything or anyone you want to keep alive and well.
Either these uvc disinfection devices are ineffective at killing germs or they are harmful to you (or both). Uvc disinfection devices should be used only by people who have done their own research on these devices and take precautions when using these devices(i.e. not being in the same room as one of these devices while it is on).
If you check the Rovyvon E200U or the Rovyvon Aurora A8Pro. They both use UV-C LED at 270 nm but the LED also generate UV-A for showing it on from seoul semiconductor.
I got this exact lamp, well, almost, mine doesn't have the ball-joint and magnet. It just got this silly lid thing on the end which is just held on by friction (not threads). I was wondering what that was for. I suspected it wasn't UV-C btw, which it claimed on the website. I was just curious about it (also bought another which is UV-C).
Now i know why so many ebay ads dont ship to the isle of man. Its because there is a man there who shows that the stuff they sell is a load of crap!
Hello bigclivedotcom
,
Congratulations on the videos, I have a doubt.
Do you know the wavelength of LEDs, which are used in so-called UV glues?
A hug and thank you.