What can I do with a UV flashlight?

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northqld38
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What can I do with a UV flashlight?

I was perusing the convoy store and noticed one of the most sold s2+ is with a UV emitter. Why are these so popular and why do I need one?

My budget is 1 light order per fortnight and in the current fortnight ive ordered 4 so im holding back!

Dreaming_
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Collect millipedes and scorpions, detect urine and blood. Portable blacklight for parties. Some can detect counterfeit money.

Depending on where you live, selling scorpions can be somewhat profitable, if you’re into that sort of thing.

I personally have much more fun with battery powered laser light shows like this.

I just ordered some Dc-fix from Boaz!

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MtnDon
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Use adhesives that require UV light to cure.

Eyesight can be damaged if used incorrectly.

Scientist
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Here is a list of a few things you can do with a UV light…

Please illuminate responsibly
Part time fragmented conciousness technician

UV triple using Sofirn C8F
395nm High Power LED in Sofirn SC31b

wle
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check green glass to see if it is the ultra-cool uranium glass

wiki U-glass

"You never have the wind with you - it's either against you, or you're having a good day."
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wle
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the tiny UV lights, are too dim to do anything in anything but total darkness

and even so they don;t really show much beyond 4-6 feet

depending on pattern and power

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
       ,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸

sp5it
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You can show your gf/wife urine stains on the bathroom walls walls after your gf/wife finish cleaning.

Think of how stupid the average person is, and realize half of them are stupider than that. George Carlin

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wle
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sp5it wrote:
You can show your gf/wife urine stains on the bathroom walls walls after your gf/wife finish cleaning.

i can tell you are not happily married Smile

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
       ,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸

UNBLF
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1, Everything white in your home “glows” when you shine a UV light on them. Lots of fun.

2, Check if your laptop / mouse / keyboard / screen…needs a good disinfectant wipe. You’ll be surprised how nasty they actually are (if you don’t wipe them every other day w/ alcohol wipes).

3, Install stuff, like tritium tubes, with UV glue.

raccoon city
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UV light causes scorpions to glow nicely.

wle
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your teeth will glow blue/white

any implant or filling, or crown – will not

the white part of your eyes i think does

wle

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
       ,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸

wle
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i doubt any light powered by a tiny battery, has enough uv energy to cause problems
i mean the sun;s UV is about 100000000 times stronger

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
       ,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸

wle
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you can also ‘quick charge’ any glow in the dark item

wle

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
       ,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸

gravelmonkey
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wle wrote:
i doubt any light powered by a tiny battery, has enough uv energy to cause problems i mean the sun;s UV is about 100000000 times stronger

The sun also emits visible light so your pupils in your eyes contract to reduce the light getting in. Pure UV doesn’t have same effect so your pupils pen up to let more light in…ooops.

wle
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tiny batteries help with that

i stand by what i said

"You never have the wind with you - it's either against you, or you're having a good day."
    Daniel Behrman, "The Man Who Loved Bicycles".
It never gets easy, you just go faster.   
-Greg Lemond.
       ,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸,ø¤º°`°º¤ø¸

Westie
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The real question is: Convoy S2 or S2+? Or Convoy S2 plus plus filter? Cool

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wle wrote:
sp5it wrote:
You can show your gf/wife urine stains on the bathroom walls walls after your gf/wife finish cleaning.

i can tell you are not happily married Smile

And has lousy aim.

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

RobertB
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You can see the dried champagne splatters on your dinning room ceiling and walls

NeutralFan
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We use our UV S2+ with a ZWB2 lens to find puppy urine in carpeting. My youngest son (19) is into rocks these days and has take over the flashlight to illuminate a variety of them.

I’d rather use my flashlight around the house than turn on the lights.

azj
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Westie wrote:
The real question is: Convoy S2 or S2+? Or Convoy S2 plus plus filter? Cool
Always add the ZWB2 filter if you’re serious about this… Big Smile
tactical_grizzly
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Here’s snip from the Broken Record Bot ‘s UV entry on Reddit.

kennybobby
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This thread is useless without pictures.

Now i used to think that i was cool,
drivin' around on fossil fuel,
until i saw what i was doin',
was drivin' down the road to ruin. --JT

raccoon city
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@tactical_grizzly:

If my family ever lives somewhere where we can grow tomatoes again, we'll be using a UV light to find tomato worms.

Sweet!

Westie
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azj wrote:
Westie wrote:
The real question is: Convoy S2 or S2+? Or Convoy S2 plus plus filter? Cool
Always add the ZWB2 filter if you’re serious about this… Big Smile

The S2 has it preinstalled.
I’ve read mixed reviews. Some prefer one over the other.
I don’t own UV flashlights so I didn’t research it.

d_t_a
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Westie wrote:
The real question is: Convoy S2 or S2+? Or Convoy S2 plus plus filter? 8^)

I'm not very sure which UV LED is used for the Convoy S2 / S2+ now..

Around 2 or 3 years ago, Convoy offered these UV flashlights (which I have ordered before):

1) Convoy S2+ (black body color) with Nichia 276A UV365 LED (700mA) w/o ZWB2 filter installed
2) Convoy S2 (black body color) with LG LEUVA33U70RL00 (UV365 3-watt) (1050mA) w/ ZWB2 filter pre-installed
3) Convoy S2 (grey body color) with LG LEUVA33W70RL00 (UV365 5-watt) (1750mA) w/ ZWB2 filter pre-installed

I have the 3 versions listed above.

 

However, on checking Convoy's website, it appears the UV365 LED used for these flashlights have been changed:

Convoy S2+ (black) UV365 = still Nichia 276A (??)
Convoy S2 (black) UV365 = "Seoul UV365" LED can't seem to find more specific data (1050mA) w/ ZWB2 pre-installed
Convoy S2 (black) UV365 = "Seoul CUN66A1G" LED (1750mA) w/ ZWB2 pre-installed

I've not tried ordering these Seoul UV365 based Convoy flashlights yet though.

 

As a side note:


I have a Convoy C8 UV, and the LED it uses is different from the one on my earlier S2 / S2+,

ie. it doesn't look like a Nichia 276A, nor the 2 kinds of LG UV365 on the S2.

 

Also have a Convoy S12 (triple UV365 LED), but I have not tried removing the ZWB2 filter to check what LED it uses.

Both the C8 UV and the S12 UV come pre-installed with ZWB2 filters.

malkoff junkie
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Malkoff UV drop in uses a Seoul LED
is Seoul better ?

Malkoff !

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Used mine to find a transmission fluid leak on our old Honda CRV. Lit the tranny fluid right up. I also use mine to check all the hotel rooms I stay in. PSA: Never use any throw pillows or comforters for anything in a hotel room.

nocturne
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Surprising none have yet mentioned disinfecting.

UV light is used to disinfect, 185nm and 254nm being the optimum frequencies –though 185nm disinfects through creating ozone unlike 254nm that kills microbes directly by, I believe, denaturing its DNA. Mercury lamps have a wavelength of 253.7nm, very close to 254nm, so they work well and are integrated into UV-C air purifying systems. While the newer power LED’s have tighter frequencies in UV-B, the light emitted from older 5mm UV LEDs was not as narrow, so a 5mm UV LED that was intended to emit near UV, perhaps with frequencies peaking between 350nm-400nm, may actually also emit frequencies above and below the peak in a wide bell shaped curve. Though intended for black light purposes, if they emit frequencies down into UV-C, even with less intensity than their peak frequencies, they will also disinfect.

I have an old ARC UV flashlight. intended for checking currency or working with identifying minerals, so UV-B or near UV, that I am sure emits some UV-C because I left it on pointing at a toilet in bad shape for most of a day. Hours later, I could smell the ozone that accumulated in the bathroom, and the next day the stuff stuck to the toilet washed down with a flush, leaving bare porcelain where the beam met it.

My hope was a UV flashlight could be used to disinfect water and make it potable, but I think to make it practical (so it wouldn’t take hours and hours), it would need to be a UV-C laser, which would be pretty dangerous to eye sight and skin, as this light will blind and cause melanoma. I have seen little mercury lamps that are intended to be purposed to be placed in a cup of water for disinfecting, but I wouldn’t trust that it can disinfect within minutes… it’s going to do something, but it takes time to kill all the microbes or enough of them to prevent getting sick from drinking the water.

Occurs to me just now, UV black lights are traditionally often used in haunted houses for effect, so that’s something else you can do with them Wink

Westie
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d_t_a wrote:

Westie wrote:
The real question is: Convoy S2 or S2+? Or Convoy S2 plus plus filter? Cool

I’m not very sure which UV LED is used for the Convoy S2 / S2+ now..

Around 2 or 3 years ago, Convoy offered these UV flashlights (which I have ordered before):

1) Convoy S2+ (black body color) with Nichia 276A UV365 LED (700mA) w/o ZWB2 filter installed
2) Convoy S2 (black body color) with LG LEUVA33U70RL00 (UV365 3-watt) (1050mA) w/ ZWB2 filter pre-installed
3) Convoy S2 (grey body color) with LG LEUVA33W70RL00 (UV365 5-watt) (1750mA) w/ ZWB2 filter pre-installed

I have the 3 versions listed above.

 

However, on checking Convoy’s website, it appears the UV365 LED used for these flashlights have been changed:

Convoy S2+ (black) UV365 = still Nichia 276A (??)
Convoy S2 (black) UV365 = “Seoul UV365” LED can’t seem to find more specific data (1050mA) w/ ZWB2 pre-installed
Convoy S2 (black) UV365 = “Seoul CUN66A1G” LED (1750mA) w/ ZWB2 pre-installed

I’ve not tried ordering these Seoul UV365 based Convoy flashlights yet though.

 

As a side note:


I have a Convoy C8 UV, and the LED it uses is different from the one on my earlier S2 / S2+,

ie. it doesn’t look like a Nichia 276A, nor the 2 kinds of LG UV365 on the S2.

 

Also have a Convoy S12 (triple UV365 LED), but I have not tried removing the ZWB2 filter to check what LED it uses.

Both the C8 UV and the S12 UV come pre-installed with ZWB2 filters.

I saw the C8 too. I was thinking about picking one but didn’t know which one to get. It would be fun and useful for some things but I didn’t feel like doing a ton of research just to find out which one should I get.

This one looks cool. I wonder if these no name flashlights are any good or complete crap.

https://a.aliexpress.com/_mLKUUFW

nocturne wrote:
Surprising none have yet mentioned disinfecting.

UV light is used to disinfect, 185nm and 254nm being the optimum frequencies –though 185nm disinfects through creating ozone unlike 254nm that kills microbes directly by, I believe, denaturing its DNA. Mercury lamps have a wavelength of 253.7nm, very close to 254nm, so they work well and are integrated into UV-C air purifying systems. While the newer power LED’s have tighter frequencies in UV-B, the light emitted from older 5mm UV LEDs was not as narrow, so a 5mm UV LED that was intended to emit near UV, perhaps with frequencies peaking between 350nm-400nm, may actually also emit frequencies above and below the peak in a wide bell shaped curve. Though intended for black light purposes, if they emit frequencies down into UV-C, even with less intensity than their peak frequencies, they will also disinfect.

I have an old ARC UV flashlight. intended for checking currency or working with identifying minerals, so UV-B or near UV, that I am sure emits some UV-C because I left it on pointing at a toilet in bad shape for most of a day. Hours later, I could smell the ozone that accumulated in the bathroom, and the next day the stuff stuck to the toilet washed down with a flush, leaving bare porcelain where the beam met it.

My hope was a UV flashlight could be used to disinfect water and make it potable, but I think to make it practical (so it wouldn’t take hours and hours), it would need to be a UV-C laser, which would be pretty dangerous to eye sight and skin, as this light will blind and cause melanoma. I have seen little mercury lamps that are intended to be purposed to be placed in a cup of water for disinfecting, but I wouldn’t trust that it can disinfect within minutes… it’s going to do something, but it takes time to kill all the microbes or enough of them to prevent getting sick from drinking the water.

Occurs to me just now, UV black lights are traditionally often used in haunted houses for effect, so that’s something else you can do with them Wink

You mean this but a flashlight

https://www.amazon.com/SteriPen-Adventurer-Opti-Water-Purifier/dp/B003A1...

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I have a “Convoy C8 + 365nm UV LED Flashlight with Patented Glass Filter” which uses one or two 18650’s.

It is shockingly bright. I can see where painted walls weren’t properly prepared (off-white walls appear almost black, with primer showing up as whiter areas).

The UV brighteners in steam cleaner detergent is absorbed into some thread in the carpet, leaving odd, weave patterns.

Toilets look like Salvador Dalí paintings, even after cleaning. Might be the special coating on Toto toilets…

Rocks in the landscape have crazy color patterns.

Drivers licenses and money have strong reflectance info.

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To answer the question of why they’ve become so popular, I think lately the largest draw has been UV-curing glues used for phone and tablet repairs, and also for acrylic nails. Before that, the pet urine cleaning industry made a big push, and scorpion spotting has always been there. And rocks/gems, but for that the lower wavelengths are usually best (or required to see anything pop…depends on the target).

In addition to the stuff mentioned above, they are also used sometimes in dermatology. Some fungi will fluoresce or become more apparent under UV light (ringworm being a popular mention but also the athlete’s foot and jock itch varieties, and I’ve heard that at times a herpes infection can show up in the skin).

Some heart wood in trees and shrubs will also fluoresce, often green or yellow, which is kind of neat. Many in the legume family will do this. The pith of twigs sometimes lights up a brilliant intense golden yellow color.

Quite handy for leak detection in various closed system fluids, too, but either the fluid will need to have additive in it from the factory or you’ll have to add the appropriate/compatible dye yourself. Automotive and HVAC, limited use in various hydraulic applications.

The low power/small lights are great for folks that need to check identification cards or currency on a regular basis but those types aren’t good for much else.