Fake UV disinfection lamp from eBay.
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- Опубликовано: 26 апр 2020
- Selling a fake sterilising light would be bad enough at any other time, but doing it during a global pandemic when people might try using it to sterilise things like face masks is just unscrupulous.
This appears to be a cheap near-UV disco light commonly sold on eBay in various colour options.
Of the three bands of UV, UVC is considered the germicidal one and there is little evidence to suggest that UVA or near UV (violet!) is effective against bacteria or viruses.
Real UVC LEDs are available, but due to the extreme nature of UVC they have a special construction based on metal and presumably quartz glass to protect the LED chip while allowing the UVC to shine through. The wavelength tends to be on the transition from UVB to UVC and because LEDs without phosphor tend to be a very specific single wavelength there are often visible LEDs used in the circuit so you are aware that the UVC LED is active, as otherwise it will be emitting light outwith the visible spectrum.
The real thing is very expensive, so it's unlikely you're going to get 12 of them in a disco light housing for £16. If the same UVC LED chips were used in traditional plastic and resin housings they would be damaged quickly by the ability of UVC light to break chemical bonds.
The quoted wavelength is a UVC peak associated with real mercury vapour tubes and not one that is easily achievable with LED technology. The efficiency and lifespan of LED based UVC sources is also much lower than an equivalent mercury vapour type tube. (The clear fluorescent style tubes.)
I've contacted the seller who indignantly announced that it was UV because it's purple. I'm inclined to think that this light is not germicidal at all.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
www.bigclive.com/coffee.htm
This also keeps the channel independent of RUclips's advertising algorithms allowing it to be a bit more dangerous and naughty. 
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They dont ship to the isle of man because there is a guy that lives there that takes their shit apart and proves they are fake.
@Sir Scofferoff Isle of Man implies there is only one, man is singular... so the other resident must be a woman.
@@monkeywash4374 Well she's going to be very disappointed then...
@@Chrisamic Lol. Or she might get taken apart and reverse engineered. That could be interesting.
@@Chrisamic Unless she is a cross dresser. Then there might be one fake that pulls one over on Clive. However I think he can tell the difference in the end.
@Sir Scofferoff 50/50!!? There are two Big Clive's on the Isle of Man? :-)
2:55 "Doesn't post to Isle of Man" - they're onto you, Clive!
This must've been developed by bacteria so they could have a nice safe disco party.
Not if they are using DMX ;)
@@lostjohnny9000 dmx was created by the CIA to control or decimate american citizens. if you take dmx (or pretend to take it like the cool internet redditor u r) it'll fuck you up beyond rock bottom. have fun fellow 4changler!!!!!!!!!!!!!
@@jaighter Mixing up a chemical (DXM) with a comms protocol for stage equipment (DMX or DMX512) can cause confusion and other side effects, included but not limited to...
@@nebufabu lets smoke some drain off from grease traps broham
“Someone will cause injury through the artificial human skin."
In other words, replicants should not use this lamp, or someone will stab them.
;D
Ha
Obviously robots created this product.
It may just contain mackarel
@@zep4814 for tuning, obviously!
EBay, the only website on Earth where you can get a dangerous UV light that claims to be safe, and a safe UV light that claims to be dangerous
Welcome to another episode of "Clive knowingly wastes his money for our amusement" ;-)
His house must be full of junk by now (just like mine)
@@donbriggs9128 nah, the IoM just send an electronics disposable vehicle specially to his once a month
@@Poisson96 Then shipped off to China for recycling back into more useless fake junk.
Clive's house is full of junk, so that I don't have to buy any :)
Well, it's £15 he's almost certainly gotten back.
Get a dispute started as it's obviously not as described.
definately dispute as said and it may help to stop chinese false selling (some hope) :-)
Absolutely, I actually buy things I know will be fake sometimes just to dispute and punish the seller with shipping fees... They know this stuff is fake but sell it anyways knowing they'll pull a net profit including disputes.
3:21 1. Insufficient disinfection and sterilization
Sounds like they nailed the description :)
@@jkenny1 you should get a fake deathadder razer mouse then XD there are LOADS of fake razer products on eBay for like a 10th of the price. I got a fake one intentionally and it is not toooo bad. But yes just say "it's fake" and even tho they list it as OEM so people don't do that they do say 70% of the product is real. This is false obviously. Even if you did it by number of components or even weight all of it is FAKE. Lol it does work nice as an office mouse tho - fairly decent for like £10
Has it just got millions of buttons on it? Is that how it's any different from a regular office mouse?
"Let's stick that finger across the capacitor Ya, its discharged". Love It!!
I "found" a large capacitor inside a faulty drill battery charger once, If Clive finds one on camera the video will definitely get demoneytized!
He will always say "Ya, its discharged", it is what he might say immediately - and loudly - beforehand that will be of interest.
Any expert thoughts on this?
Now try that while tearing apart a microwave oven!
@@sapuseven6119
_"Don't try this at home"_
- Experts
Should have read "doesn't post to bigclivedotcom". They are on to you.
"Don't sell anything to that dammed Scotsman on the Isle of Mann. He's ruining our business."
@@rpbajb At some point, he wont be able to buy anything from China anymore.
@@chinanorthairguns So we will have to buy the things and send them to Clive
@@adamswenson1093 not exactly a bad thing is it? Gives us viewer interaction and send him stuff that would be interesting to us and him.
It's hard to know which is worse: selling a fake lamp which emits no UVC, or selling one that DOES emit UVC and can damage your eyes and skin.
It's alot like a gun.....it kills things, so the idea is aim it at the target and not at yourself.
Well considering the lack of warnings and stickers to advise of UVC danger, I'd be pretty happy it's not actually.
If you want to disinfect things you need the UVC. You just need to use it with proper safety in mind.
@@neville3151 but with far less popular knowledge of how they work and what safety should go along with such a tool.
@@jkenny1 Absolutely correct.....got flash burn from welding when i was younger and the pain was near unbearable.
The fact they're selling a "UVC" lamp with DMX on it
"Twats!" - I don't think I've ever heard you say that before Clive.
Something far ruder, also appropriate.
I agree, it was a surprising outburst from the big man himself !
He usually uses sarcasm and humour to point out safety bypasses, I've never heard him get angry about them before !
5:00 SMOOOOOKE ON THE WATER - FIRE IN THE SKY!!!
They basically did the electrical isolation right, then ruined it to make the board 5mm narrower. The proper design would have the opto isolator next to the Y capacitor so the isolation gap runs directly under it. Instead they shifted it lengthwise on the board so the extra tracks runs too close to the live mains tracks. Casing was big enough for a wider, shorter board, forcing internal examination to spot the danger.
Twat are you referring too?
"the family must leave the irradiation area when the light is turned on, or someone will cause injury through the artificial human skin."
is that a threat?
I hate it when someone causes injury through the artificial human skin.
who's walking around wearing artificial human skin?
@@dindog22 who isn't?
just if you have artificial skin xD
Synths beware
Thank you so much for making this video this! I think more of the products need to be looked at and taken down. It's really messed up that they are profiting and people could end up sick if they attempt to sanitize gloves or masks with these.
Open a dispute and make them pay for the return shipping as well as your refund, then add insult to injury by leaving a 1 star review
😃 1 star. Would not recommend.
Thanks Clive, a timely reminder of how easy it is to buy garbage and think you are going to be safe.
"Doesn't post to Isle of Man" hahahahaha!! Clive you've been rumbled! LOL
Megabyte!?
@Plokman040 Indeed! I have a huge ReBoot collection including crew jackets hockey jerseys that the makers wore when playing, such as the one I'm wearing for the background of my RUclips channel art.
- The family must leave the area, or someone will cause injury through the artificial human skin!
Sounds terrifying.
Leave the area, or else!
The amount of capitalization on a global pandemic is disgusting. Glad you're exposing these fakes.
Capitalists ARE disgusting.
edgeeffect That may be, but it was communists who caused the pandemic. I'd say capitalists are the lesser of two evils.
@@spencerwilton5831 communists? PRC are capitalists.
@@spencerwilton5831 you speak like there are only two alternatives... all societies must be capitalist OR communist...... for ever.... that is mind bogglingy limited thinking.
"I don't like 'A' so I'll espouse something equally stupid and equally vile because it MARKETS itself as the opposite of 'A'" just doesn't make any sense.
At the office of the e-bay seller:
Employee 1: Boss! Have you heard? We got an order from Isle of Man!
Boss: What!? Cancel the order!
Employee 2: It's too late, it already shipped!
Boss: WHAAAT??
E1: Eh... I guess we'll stop shipping to Isle of Man..
E2: What's the big deal?
B: That's an order from Big Clive!! He will tear us, and our product apart! We can't him showing our substandard products on RUclips!!
E1 & E2: Ohhh... Crap...
idk for the money a its a pretty decent dmx controllable black light I'm 100% sure if they labeled it correctly big Clive would have still bought it
@@ChrisD4335 very nice sounding accent, to me at least
@@ChrisD4335 and im pretty sure that clive's audience would actually be more likely to buy most of the products he tears apart
Since the release of this I have received Amazon/eBay/Ali X emails offering similar products wth equally dubious claims. I'm srprised that Dr Trump has not caught onto them ....Oh wait they must have spammed him as he is now wanting to inject the light.
@@barrieshepherd7694 Dr Trump should inject you FIRST.
I remember getting a "Shortwave UV" lamp for mineral identification (I think those are UVC), and wandered around my parent's kitchen to see what would flouresce. I discovered that lead-crystal glasses flouresced a pretty pale blue. Try to find some old Wedgewood crystal glasses at a 2nd hand store or estate sale to use as an indicator for UVC.
Uranium glass?
@@PieterPatrick that's brilliant green.
@@Muonium1 With other elements in the glass, the color can have other colours like blue.
Google "blue uranium glass" and you will see a lot of beautiful pieces.
@@PieterPatrick If it's blue under visible light then it's other elements imparting that color to the glass but if it contains any uranium it's still going to fluoresce green under uv regardless.
@@Muonium1 Ok yes ofcourse.
Excuse me.
Great! The skin smell test is really the best test if the UV is even remotely short. UVB will cause the oils on the skin to break down which you can smell, and it works quite fast.
As far as I'm concerned your a real superhero. Really. Who else would take the time to order a product and do an honest eval and analysis? No one except big Clive. Thanks.
"What if I pointed straight at the back of my hand.......... Then sniff my hand to see if there's any skin damage"
That made me laugh more than it should.
I wish I knew even a 1/1000th of the stuff you know Clive. Loving the content.
I wish I knew one ten thousandth of his knowledge and understanding of this wicked magic... I'm a mechanical engineer (was, now disabled, but that's a different story)... I understand moving parts and how they operate with one another. This stuff that gets rectified and transmorgrified to be ohms and amps and volts... I don't know watt he's saying, but it's fascinating none-the-less!
I almost understand a FULL BRIDGE RECTIFIER!... only because ElectroBOOM says that all the time.
@@johnathansaegal3156 I love that you said it in capital letters as in my head I also said it in Electrobooms voice.
I bought a portable UVC wand the other week, and to test it out, I turned it on high and placed it perpendicularly over a strip of natural, undyed latex (catapult bands).
I left it for a few hours, and your could definitely see that the lamp had bleached the bands somewhat.
I then took a lidded black plastic crate from Poundshop, drilled a hole in the side near the top and screwed the wand in place. I also lined the inside base of the crate with tinfoil & sellotape to help reflect the UV.
Now I can put keys, masks, change, credit cards, pocket knives etc in there and cook them for a while to disinfect after going shopping.
Didn't it stink? I tried a UV-Tube for 30min in my bedroom and not only was the ozone smell really strong when entering the room but it also stayed for am additional day. I couldn't imagine sleeping in that ozone atmosphere.
@@MetalheadAndNerd my wand is a strip of LEDs, as opposed to a tube light.
Haven't noticed any ozone smell.
My nose is pretty shit, though.
@@CountDoucheula Are you sure that this wand really emits UV-C? UV-C LEDs are expensive.
@@MetalheadAndNerd oh no, it's legit thankfully.
I definitely got a sensation when I've run it over skin briefly.
@@CountDoucheula Okay, then the ozone generation maybe only happens with tubes.
Thanks Clive! You could have saved my life! I bought one of these "disco lights". I believed the hype. I have been using it to disinfect my face masks after use - hoping it was doing the job. No wonder, after a couple of uses, they remained a wee bit smelly and I had to wash them anyway. The one I bought on eBay is exactly the one you describe here. It was a miracle I found this video. You are an angel! Keep up the good work!
“Supposing we hit the body with a tremendous - whether it’s ultraviolet or just very powerful light”
Someone should look into that.
I'm sure somebody will get on it after we finally start investigating the effectiveness of injecting bleach /s lol
@@strayiggytv why, that would have to be 100% effective, as none complained after injection!
Ha ha ha - I’ve just returned one of these!!! I also did the sniff test and immediately came to the conclusion it was junk.
Thankfully they accepted my claim for it to be returned.
I guess when Big C rejected it, he moved on to the 8 Bit Guy.
Hope you dont let them get away with this, open a claim and make sure you get refunded
F U C K C H I N A and their shitty fake products. BOYCOTT CHINA and only buy from reputable countries, but local!!!!
Every dollar you spend is a vote for the type of world you want to live in. Do not support shitty products or evil communist regimes.
GOODBYE CHINA
@@regenerationplantation you mean you don't want to financially support Covid 20?
I got it now: Order a UV disco light, get a germicidal lamp. Order a germicidal lamp, get a UV disco light. I think some sellers get their jollies by doing this. :)
4:50 "It's a disco light" the new trend post quarantine will be to have one of those hanging so people can dance disinfected, and as you know that trend also started in China a couple of years ago.
I'm quite confident they moved the optoisolator from next to the interference suppression capacitor into the primary side to be able to produce a narrower and thus cheaper board.
Would you mind explaining a bit about the optoisolator's / interference suppression cap's purpose and why exactly he was angry? I'm guessing the aforementioned cap is to reduce noise from something in the circuit [switching PS?], and maybe the path being so long allows for noise to couple in(?) but past that I'm shamefully uneducated and have never even heard of an optoisolator. ..
@@lacunate The power supply should convert the high voltage from the mains that is dangerous and can kill you when you touch it in an unfortunate way into safe low voltage that can tickle you, but most likely won't ever kill you. So it is *very* important to keep mains voltage (called "primary") and output voltage (called "secondary") apart. An important concept is called "clearance" which is the distance of PCB tracks that are connected to mains from those tracks that are connected to the output voltage. It is accepted that the clearance is supposed to be 3 millimeters at the very minimum, but 5 to 10 millimeters is definitely better. You need the distance because the PCB is not a perfect insulator, and the mains voltage might creep into the ouptut voltage. This is espacially true if there are some high voltage spikes (with that I mean pulses that are 1000 to 1500 volts) on the mains, which could break through the insulating paint on the PCB and burn it away. Such spikes do happen. And if the paint is burned at some point, and you keep operating that "germicidal lamp", er, dicso light in a diso-like environment with fog machines around, it is possible that residues of the fig fluid condense on the board and form a conductive layer that makes the output dangerous to touch. In this supply, there are tracks connected to the secondary side that get *extremely* close (I guess around one to 1.5 millimeters) to connections on the primary side, which makes this supply dangerous, especially if you connect an external controller via DMX, or just if some wire inside that thing touches the metal case. This is why Clive got mad - especially because the distance between primary and secondary side is quite good at all other places of the supply. So they really tried to make a safe PCB, and then they messed it up completely.
This supply has three components that are connected to both the mains voltage side and the (supposedly) safe output voltage:
1) the transformer. It converts the input voltage into a magnetic field, and then convertes the magnetic field into the output voltage. There (should be) no electric conductivity between the input and output voltage. The quality of the isolation of these transformers is often extremely unexpressive (that's an euphemism for: dangerously low). See videos from DiodeGoneWild about cheap dodgy USB power supplies. He disassembles the transformers in those supplies and analyses how far the mains-connected and output-connected wires are really away from each other.
2) the "interference suppression cap". The power supply works by making a high frequency voltage (likely around 100.000 to 300.000 Hz in this supply) out of mains voltage, and sending the high frequency through the transformer. The basic idea is that a transformer needs to send a whole "half-wave" (the time where the polarity of the AC voltage does not change) at once. So the longer the half wave is, or the higher the input voltage is, the more magnetic field is created inside the transformer. This means the transformer needs to be bigger to handle lower lower frequencies or higher voltages. We can't easily lower the voltage, but we can easily in increase the frequency by a couple of thouands using modern electronics, which allows a very small transformer. Because the transformer is a very small device with wires and a bit of insulation between them, it also behaves as a capacitor, and transfers the high frequency stuff to the secondary side. The secondary side is connected to a lot of devices and wires, and behaves as antenna that sends this high frequency as radio waves into the environment. That's forbidden, so you need to take the high frequency away. The way you typically do that is to use a capacitor that conducts high frequency much better than the unintended capacitor in the transformer, and connect that to a place that is able to safely dispose of the high frequency. This is often one of the mains connections, or protective earth. It is very important that this capacitor does not allow lethal currents from the primary side to the secondary side, even when it is mistreated with high voltage pulses or breaks down of old age. That's why you must use a capacitor that conforms to some safety standard in this place. If the capacitor has been tested to be safe enough, it can be certified as "class Y".
3) the optoisolator. This is a small plastic box with 4 connections. Two of them are connected to an internal infrared LED that lights up if you send current through them, and the other two are connected to an internal light detector. These components are inside the case, so the light detector only receives light from the internal LED, but not from the environment. The LED is connected to a voltage sensor on the secondary side and lights up when the voltage at the ouput of the supply is highe enough. The light detector is connected to the primary side and tells the control chip to send less energy into the transformer. Think of it light a car going downhill: If there were no brake, the car would accelerate so much that it will get to fast, and finally kill you. You need to push the brake a bit when you are fast enough. The LED is like the brake pedal, the optoisolater like the brake line that transfers the pressure to the actual brakes and the photodetector is like the caliper that actually pushes the brake pads to the brake discs. You would never want to touch the brake discs youself, not just because they are out of reach, but because they get dangerously hot, and apply a dangerous force to you, so you need something to separate the dangerous wheels from the safe pedal. In this supply, the "brake" information is transferred through the optoisolator.
@@lacunate The optoisolator (optocoupler) is okay, it's it's location that's the problem, its secondary pins (meant to be a safe voltage) are very close to the high voltage side of the transformer. That could allow the high voltage on the input to the power supply reach the low voltage output, if this was a phone charger your usb cable might be at 100's of volts.
@@tw11tube I am nearly speechless. This is probably the most informative comment I've ever seen. Thank you so much! As someone who's TA'd an intro to electronics for non-majors class (I've only done slightly more circuits than that--I do more computational/medical imaging stuff in my EE subfield), but more generally cares a lot about pedagogy, this was not only mind-expanding but heart-warming as well to see such care put into the explanation. I might even borrow some of your analogies for use in the future! Thank you so much!
@@tw11tube Thank you very much. I'm glad I scrolled through the comments before Clive called me a 'twat'!?
My initial reaction was 'what's wrong with an optoisolator'? My recollection was that they are rated 1kv isolation at a minimum? They are what you use to isolate a digital circuit from the 'cruel world' (simplified for brevity...) in many control situations (or, at least they were, back in the '90's) but I admit, I didn't immediately 'cop-on' to the physical isolation problem. I'm a bit embarrassed now! I thought I was 'shit-hot' at one time or at least considered capable enough...when nobody could sort a problem in some (very expensive) control systems, often on Oil and Gas rigs, the company sent me! I had a 100% success rate.
Spookily enough, I once identified an intermittent failure (the worst kind) using a UV light...one particular circuit board had been replaced three times (on an Oil rig, imagine the costs and the penalties?)...by the second return, I was 'on it', the rejected board worked perfectly and I personally tested and vetted the third...three months later another miscellaneous fault notification (evil evil intermittent faults) and I had been all through a similar system and had no problems, faults or theories...no 'ah-aha!' moments. So off to the heli-port, away to the rig, seated beside the baleful head-honcho who was taking control and made it clear that he didn't like 'paddies' (hey it was a fact of life in the UK at that time, paddies were thick?). Long story (already) short, I knew the circuits, I knew they were good, I knew the last one was good so I went entirely through the system (just like had been done before me twice now) and there was nothing wrong. I have a great disdain for 'board jockeys' but I began to rule out the circuits and look instead to the connections between them (with 'boss-arsehole' breathing down my neck..) I had brought the last 'failed' circuit with me and I noticed the conformal coating looked a bit 'ragged' So I examined the latest one, again, it looked kinda amateurish? So I begged an ultraviolet light from the tech/security guys.....lo and behold, conformal coating all over the gold-plated connectors?! Seems like a certain well-intention-ed 'engineer' had told the guys to spray any new circuits being delivered? Without any masks? I 'hard-wired the connections to the main controller, not a problem since.
I hope my story is equal to a coterie of engineers who have been there, seen it, done it......you auld bastards!
Time to actually form the 'tall hat society? This is such a real thing that there should be solicitors and indeed, what the entire project needs, just ne person who understands
Lmao. "99% kill" sounds like something Vargskelethor would come up with.
The wavelength from the UV disco lights is barely short enough to cause the security ink on a UK bank note to fluoresce. They are the equivalent to the oldschool disco fluorescent tube black lights (but the old ones *can* show the UV ink on a banknote). Disco light 'UV' leds are just the white ones but without the phosphor.
Thanks for this Clive!
I'm in the process of manufacturing 3D printed face shields kits for local essential and medical workers and I wanted UVC treatment as the last part of my process.
I figured LED version would be easier to use than the T8 tubes, so I ordered one like in your video and a E27 60W LED type to try. I only realised once I got them that something was not right with either.
This video gave me the confidence to declare to the sellers that they are fake and I asked them to stop selling the fake lights and give me a refund 😊
I already gave up on having UVC LED and bought two Osram G55T8/OF 55W which are perfect for the job.
The e27 lamp was probably bright blue? I think it's just ice-blue LEDs to make it look like a mercury vapour lamp. The only proper UVC lamps are the glass tube ones.
@@bigclivedotcom Yes very much turquoise, and the LEDs are in plastic housings.
I did know better, but wishful thinking left me hoping they were the simple solution I was looking for.
I was left with the pickle of how to prove they are fake knowing little about them, but thanks to this video I no longer feel the need to prove it.
This UVC stuff is all a bit new and I wasn't quite sure which way to go with it, but I'm certain the Osram G55T8/OF 55W will do the job!
I'm using a grow tent with clothes drying tower racks inside where I can place the zip bag kits and blast a batch of visor kits.
Then they go into a secondary clear but larger bag and blasted again so then I know it's pretty safe overall and the user only really has to worry about that outer bag.
Digikey has 272nm UVC 1W LEDs for $18 each. 200mw for $8.
1W? Horseshit, more like ~7mW, but yes, it does indeed eat 1W or so.
So I've been reading around - inactivation doses are around 2000-8000uW*s/cm2, so getting all that light onto 1cm2 will inactive it in 1s, now the inverse square law kicks in...
Mercury lamps on the other hands do a few watts per cm of legth...
@@VEC7ORlt I found the item, all the digikey products are listed by power consumed, none of them list radiated light power. I REALLY want to see some of these reviewed somewhere! I agree with the ~3mJ/cm^2 fluence dosages but I think those apply more to aerosolized viral particles and I'm reading closer to 100-200mJ/cm^2 for surfaces. Depends on what source you're looking at. The T5 8W $15 chinesium quartz UVC lamp I got for decontamination recently should do the job within 5 seconds or so of exposure when it's a few cm from the surface if I did my calculations right....
VEC7ORlt Yeah, the most powerful UVC LED I found is 50 mW and it’s about $40 a piece...
@@Muonium1 Sorry, but the rest of us can't help it if you're an idiot.
@@stargazer7644 Says the loser with literally zero channel content
open a claim - people are going to be panic buying these things, hopefully if enough people claim, they'll stop selling them
Thank you Clive. Very much appreciated for what you did here and more.
I actually use this as a disco light, but it wasn’t advertised to disinfect. Typical fake marketing on this one. Thanks for taking your time to review this.
BigClive. Causing eBay sellers to update their shipping to Isle of Man settings...
And then have to block Australia when Dave Jones from EEVblog takes over.
Could you expose the front assembly to actual UVC light to see how the material holds up?
We've studied using the UVC leds to prevent underwater biofouling. Because they don't emit any visible light, they are actually quite dangerous. When working on them we would need a special interlock in place to ensure we weren't damaging our eyes and skin by working in close proximity to them whilst on. The fake lights have been around for awhile (I remember an advert from 2014) but must be much more prevalent at the moment.
Some of the UVC LEDs either contain an extra visible LED chip or have it on the PCB to let you know the thing is active. Really terrible efficiency and lifespan compared to mercury though.
@@bigclivedotcom yes, and there were a number of other issues. Incredibly high price, low output, lots of heat to dissipate, poor transmission through most types of glass (a general issue with UVC). We also didnt want visible lights showing as this was a camera window. Mercury is still better, but a big hassle to incorporate into a design as it is fragile and bulky. LEDs would be much better if they were more efficient.
Thanks for keeping us all entertained while we're in quarantine. Cheers mate!
"Someone will cause injury through the artificial human skin" -- I'm hearing the Westworld theme now...
"Doesn't post to the Isle of Man" -- Probably doesn't post to any part of the UK. But since your location is set to Isle of Man, it's showing you that it specifically doesn't ship to *_your_* location.
It would be interesting to test the forward bias voltage. The bandgap (and hence forward voltage) is dependent on the wavelength. UVC should have a relative high forward voltage.
ottard
explain that so someone that has porridge holding his ears apart can understand please :-)
@@YTANDY100 Haha! Semiconductor physics is hard for everyone. You can try searching youtube for "Semiconductors".
Totally interesting as usual, wow, I love watching your videos. I'm retired now from tv etc. servicing, and all those sort of fields.
This and a couple other channels are keeping me sane. Thanks!
"Death beam capacitors" PMSL :-D
"artificial human skin" I need to get some of for research reasons lmao
Dr. Peyton Wilder?
@@TheAnonymousrogue I have no idea who Peyton is, I've never heard of Darkman in my life you must be mistaken yes you must be.
Commonly available as a tattoo supply for practicing on.
Another interesting vid. What happens to the fake products from fleabay that you test? Do you report them on the site so they can be removed? Just curious!
By the way Clive. I saw you have a Maplin Precision Gold Vernier caliper. It is ABSOLUTELY FASCINATING how it works. Mine was playing up so I dismantled it and was flummoxed as to how it works. No grating no optical device just a VERY CLEVER PCB layout and IC. I know you would find this absorbing.
It will make your Gin and Tonic glow nicely
Everyone should swap their usual mixer to tonic 'cos it's got quinine.
Let’s hope this is what all the Trumpets have ordered off eBay since Orange Man told them it’s worth a shot, not the real sterilisation bulbs that will turn their eye balls into sand.
They're not daft. Trump was briefed about this new invention aytubio.com/healight/?fbclid=IwAR1v5lwFPewOf9ix0-AN3uFz9mpbTD22nV2zpP-XT2ZcyGjfZxLHRI_iAo4- a sort of UV emitting flexible glassfibre stick that goes into the trachea through the intubation tube. The UV light disinfects the airways within seconds. Still in the process of being tested.
It's easy to spot those who still believe the MSM goons. Donald been trolling ya again.
spencer hardy
“So, supposing we hit the body, with a tremendous, uuuh, whether it’s ultra violet or just a very powerful light, and I think you (he addresses Dr Brix*) said that hasn’t been checked and you’re going to test it, and then I said supposing you brought the light inside the body, which you can do either through the skin or, uuuh, in some other way, and I think you* said you’re going to test that too? Right, sounds interesting.
And then I see the disinfectant, where it knocks it out in a minute, one minute, And is there a way we can do something like that by injection inside or almost a cleaning because you see it gets in the lungs and it does a tremendous number on the lungs, so it’d be interesting to check that, so that you’re going to have to use medical doctors with, but it sounds interesting to me. So, we’ll see, but the whole concept of the light, the way it kills it in one minute. That’s pretty powerful.”
Sales of sterilising germicidal UV bulbs have risen hugely on eBay.com.
Good job! Thank you for doing this! Worse than scam customer's money, these fake disinfection lights expose customers to danger---customers think stuff is disinfected and safe, and is not.
The only "99% kill" this stuff gets is their hapless consumers unfortunate enough to purchase these products.
There ARE led Lamps, that light up that lovely bright blue!
Are they UVC though?
@@AnonymousUser77254 no, they aren't
Banggood are selling those LEDs for £6 for 5! Tempting!
I bought one for my $20 just to prove a point to a friend. :-) I exposed freshly inoculated Petri dishes at 30 sec, 1, 2, 4, 8 mins, etc. And absolutely no change from one side of the plate in the shade from one side in the fake sun. 30 seconds with a real light would be obvious.
Hi, i enjoy your videos very much and long time fan. Keep it up. One question, you showed a Uvc diode and mentioned that it barely gives of ozone. Can you keep those diodes on as long as a regular led? Have a good one :)
They are inefficient ahd have a short life. They can't compete with a tube based UVC source.
OOkay, there is a capacitor there. Let's stick the finger across that capacitor
*YEEEEAH IT'S DISCHARGED*
If there’s no law or other downsides to scams like these, there will always be some people who will do it to make more profit.
It wouldn't matter even if there was a law against this. No one is going to be able to track down the original seller.
GemCat It “works” with lots of things though: weapon, drugs, etc.
Hey Clive good work by you. I welded together some 6061 Aluminum round tube and sheet into a frame to mount 4 ea 36 Watt UV-C germicidal tubes. These tubes are new and hit the 254 nM bench mark. I talked to several Doctors and they tell me that 250 J/cm2 is the kill zone but it takes time to achieve this. Most viruses and bacteria are disabled at first blast of the light but they recommend 36 mins of irradiation to fully sanitize a mask or any product that is made with blown fiber so I use 36 mins when I do rooms with my zapper. Its is NOT instant like these companies try to make it sound. Keep up the good work as you are exposing these frauds!
Thanks Clive. Always enjoy.
What printer do you use?
Epson ecotank.
I'm glad I stayed well away from this type and got the U-style UVC tube. With ozone!
Same here. I skipped over these and bought the real UVC tubes.
How much do they cost?
@@Andy_Holmes I paid about £15 for one that fits an E27 socket, but the only ones currently available on ebay are from China so you may have to wait a bit.
"DMX Germicidal". Gotta love those germicidal controllable disco lights!
would be nice to see a shop tour and see how you usually record all your amazing videos for the tubes :)
lmao just the concept of a DMX controlled gemicidal lamp 🤣🤣 wtf
222nm UV light is being studied for use in large area disinfection, it so happens that 222nm does not affect human skin....
that sounds a bit like this news.columbia.edu/ultraviolet-technology-virus-covid-19-UV-light and based on this doi.org/10.1371/journal.pone.0076968 paper - I would not be that trusting of anything purchased right now without a multi thousand dollar analyzer for the uvc spectrum to ensure only far uvc - could be useful for cruise ships, not my area tbh
Thank you for bringing that up. 222nm is like a proton torpedo fired by a non-Jedi, it just impacts on the surface of the dead skin cells. But when it hits a small thin skinned virus it powers right through to the DNA/RNA and breaks it.
@@glennachten6515 Why not a double slit metal plate to split the spectrum and a piece of B/W wide spectrum film to capture it. Plus a quartz lens to direct the light to the slit. Optionally use an uncoated CCD sensor chip instead of the film. Use a few separately bought traditional single line LEDs and a quartz lamp to test and scale the result.
@@johncrowerdoe5527 I think I've suggested before on another of these videos to use a known UVC led as a sensor, as it should create current when exposed to a similar wavelength but again not my area and I'm more than happy to be corrected plus that is an oversimplification as a given device may emmit more than one wavelength, however if I were doing this for a business or institution and not as a mad science one off at my bench then I would want some CYA with a certified Analyzer
@@glennachten6515 An UVC diode sensor doesn't report an actual spectrum. A double slit would avoid aberrations from specific glass types and is a quite traditional instrument for the job. Using separately bought known spectrum sources to test provides proper CYA calibration, preferably with a known pure substance listed in the scientific literature. Uses beyond confirming fraudulent lamps is measuring RA for good lamps and identifying unknown substances.
Thanks for the informative video, sir what do you think about far UV lights, and is it comercialy available, and if the frequency is within the value they are mentioned,
Good Day, and Take care!
🙏
I recently bought a few UVC lamps off eBay. I opted for the tubular mercury vapour lamps because I know they produce the real UVC for disinfecting. I was very skeptical when I saw these purple LED disco lamps being sold as "germicidal". I knew they had to be fake. Thanks for confirming it.
Defiantly a dispute on eBay...
Why defiant?
@@TheOtherBill cos they are defying the dispute....lol
"Actinic Blue Glow" - the ghostly blue light BC mentions!
It gets a lot sinister as will be revealed in the next video. It appears some sellers are selling standard LED lamps fitted with ice-blue LEDs to fake the appearance of real UVC mercury based lamps.
@@bigclivedotcom why don't they want to earn money off unsuspecting youtubers who think they sponsor you?
Thank you for covering this. I was wondering this myself while on ebay looking for a UVC lamp. I kept thinking "Is that a blacklight and they are just pushing it off on a UV technicality?"
@bigclivedotcom Thanks for this video! I had Almost ordered this product! What product would you say is the best for disinfecting a large room? Thanks!
If you want a real UVC source the type with clear glass fluorescent tubes are the most likely to be real.
I bought a similar “corn” UVC led light and those are also fake due to the wrong chip set and the price point. I even gave them the benefit of the doubt and ran a test for 2 weeks growing mold and it actually accelerated the rate of growth! Chinese scammers should be charged with negligent homicide for this.
Personally, I'm glad this was a fake. Someone who responded to this ad (not you, of course, you're a professional) and believed the hype would probably set it up so the whole family gets bathed in the "safe" sterilizing glow as they come through the door. I just shudder to contemplate it.
Or based on Trump's comments try and somehow shine it into their lungs.
@@98dizzard Do a google search for "healight".
Doctors literally already testing a uv emitting catheter in the lungs to disinfect covid 19.
This is literally the "uv in the body" trump was talking about when he said doctors were looking into it.
Graeme Evans
No. Wrong. Incorrect.
Impeached Trump is just stupid.
@@makeracistsafraidagain wow theres more nut job here than i thought.
@@ge2719 7 days ago they announced it from what I can tell. There's also no studies to show it will work, or is even safe. It uses UVA light, which is less harmful, but still can cause damage. I would be very concerned about the possibility of it resulting in long term damage like lung cancer, strong enough UV-A light to damage a virus inside a cell is surely enough to damage the DNA inside the same cell. Sounds more like a company trying to bump their stocks, which it certainly did.
Five wires (red, green, blue, white and yellow) going to the board, twelve LEDs. One LED has an 'R' next to it another a 'G'. Odds on this was originally designed as an RGBW light.
Yeah, he said that.
@@stargazer7644 Near the end. I though "that seems a lot of wires to the lamp" when he took the top off at about eight and a half minutes.
"Let's point it at my face and see if I can smell any ozone... No? Well, let's point it at my hand to smell skin damage AFTER I've pointed it right in my face" - dunno, but I just had to make an evil giggle.
Have you actually gotten your hands on a UVC LED? I'm deeply into Fluorescent mineralogy and could certainly use something that doesn't wash out the rocks with those other spectral lines!
That said, you could use a hunk of Willemite as a safe test for UVC frequencies. I could send you one, or you could probably easily find 'em on Ebay.
I tested out a UVC LED on some of my fluorescent minerals but found little to no reaction to most SW-reactive minerals. The LED did cause clear lead crystal glass to glow sky blue, but most minerals nadda. Wavelength just isn’t quite short enough.
@@AScannerClearly Willamite glows weakly under UVA (395nm) a bit stronger under UVB (365nm) and at 254nm can almost be seen from space. So if it is barely glowing I'd posit that there is no UVC from your LED at all.
Gotta ride that corona hype and make money.. the chinese way.
7:51
Do I need to use all of the LEDs for the death beam to be effective? Or could I make several death beams? Do you think I could use the same powersupply to power my brown note emitter?
Clive,
Just wondering...what do you do with all the dismantled components you end up with? Bin them? Or do they get sorted and safely stored in a set of mini drawers...waiting for the "mad" electronics scientist's next project...?
They usually get rebuilt or the parts filtered for the good bits and stored.
Haha! I knew it.
I love taking stuff apart especially printers. So many steel shafts and cogs to good to waste. No idea when I'll use it all ...although I do build models. I studied electronics in the eighties...but got terribly confused by gobbledegook and stuff that doesn't move - nand gates not gates etc nor....so I went down the more Mechanical path where you have simple things like pressures and temperatures...turbines - Power!
NEVER throw away what might come in useful!
Ps
That was mentioned in the divorce tribunal...😡
Can you do a video about electronic mouse repellers or whatever youd like to call them. My friend has them all over his house i want to disprove him.
He should go to the shelter and get a cat. =)
Those things are effective at repelling electronic mice, though.
Shawn Woods. Mousetrap Monday. He's covered these devices before, I think.
I did a moderately scientific test of one of these devices for an Amazon review: amazon.com/gp/customer-reviews/R26DB0OHDLQ42H
@@crimsonhalo13 ok thanks
"Lets point this thing at my hand and see if I get skin damage" you would probably get along well with CodysLab
It's a disco light, with connectors for remote control/light show. The same is available on AliExpress too
I noticed the fan is actually blowing to wrong side. Sucking side has lower cooling effect than blow side. But if fan is correctly mounted, the wires will hit the fan and block the rotation. So it's not great design or wires are not guided around the fan very well.
0:58 either this type or the youtube-type
wait what?
U shaped tube :)
@@glennachten6515 yeah figured that out somewhere down the road
Make a claim. Haven't you made a video on a similar UV disco light before? (not complaining about another video)
Congratulation with your new PCB photoresist fast curing lamp!
Clive, thanks for these, and by the way, what's the smallest unit you're aware of that generates ozone?
You can get little U-tubes just over an inch long that do it.
@@bigclivedotcom Like 0:46 ? That would be perfect. Can't find. What are they called? Thank you.
It's kind of mind-boggling how much O3 (and presented-as O3) stuff there is out there for sale online these days, and thanks again for the heads-up.
By the way folks, a little public service announcement here, my understanding is that the UV route (just O2 to O3) is so much healthier than electrical discharge which unfortunately also breaks apart N2 in the air. The latter winds up with varying length strings of N and O combining (nitrogen oxides), which, when they meet up with moisture, like in our lungs, turn into nitric acid.
But I often breath O3 made from UV and can say ... one simply knows if it becomes too much after a good while because the body says, hey, that's uncomfortable.
Here's one: www.rexim.com/pages/chuv/mccuv.html
Although single O3 185nm @50mm w/ power supply not listed and/or sold out, but double is available
IS THIS THE TRUMP LIGHT OF HEALTH
Mine came with Lysol and a syringe
YES HE MAKES THE BEST LIGHTS
This wasn’t recommended to you by a certain Mr Donald Trump was it?
Could this be retro fitted to use the correct r g b led's?
Not surprised but yea this is the kind of information that needs to be given out. Thanks for sharing this
Please build an led matrix that shows your subscriber count. Buying would be to easy and you once said you'd love LED's.
p. s. Love what you're doing. Am a big fan.
Isnt the ozone good for antimicrobial(even when not in direct light path), and 253 is good for viruses, or is 253nm equally effective for viruses and microbes(as long as they are line of sight)
11:40 I saw the same thing in an example layout in an actual name-brand IC datasheet for an offline switching IC. They had the optoisolator powered from one of the auxiliary windings on the secondary side with a trace going right under the safety capacitor and back to the primary side. How can that be considered isolation, even if the secondary is double-insulated?
I like how even in 2020 he doesn't just bring a webpage up on screen. He prints out parts of webpages to show at his bench.
It MASSIVELY cuts down on video editing..... which is one of the most boring time-sinks available to humankind.