I am looking for something like that, but have a hard time filtering UV flashlight reviews as they often do not talk about throw / distance.
Have to be smallish too
Any suggestions where to aim my search ?
Please be more specific. UV-light covers a huge spectrum of wave lengths.
Most seen and discussed on BLF are: 400nm, 365nm and 240nm (rather specialised). Logic approach: buy Chinese crap, or buy specialised high end, or make it yourself. Simon sells hosts and emitters that will, or at least can, satisfy your needs. You just have to specify a bit more in detail what your needs are.
If you are talking smallish, I own several lights based on Convoy C8 and Convoy S2+. Small and thrower and UV are words that seldom go together.
Just for fun I’ve equipped a Nicron N1 (AAA) light with a Nichia 375nm 5mm led. That litte sucker did cost me more than a “big” UV-led.
Now I can see if they serve me a real tonic or bitter lemon (quinine lights up under UV). But that’s only my own drink. 
I am not quite sure abut the wavelength needed, but i think the shortest one will be the best option. ( not visible to human eye )
It is for triggering / lighting up artificial markers made with UV paint at some distance, not talking about several 100 M, but if there is a fairly tight beam from 0 to 50 M i think it will be ideal.
Hank (intl outdoor) / Jacky Lee
Emisar D4V2 High Power LED Flashlight and select 8x3w or 8x5w uv led + whatever other options you want
or
UV Lights – JLHawaii808 (also has a d4v2 that’s just as good)
It looks like the only UV options for the D4V2 are mules, which probably won’t achieve the throw requirements of the OP.
For an inexpensive throwy solution, I’d probably recommend a Convoy C8 with a UV LED. For example: https://www.aliexpress.com/item/4000307648927.html
However, a C8 (while it is an 18650) isn’t the smallest host. There are plenty of smaller lights, but smaller size usually comes at the expense of throw.
Note that due to the latest lockdown in China, the Convoy store is temporarily closed - so this also won’t work if this is an urgent need.
Yeah, I stuck/sticked/whatever a UV “bead” LED into a cheapcrap disposable C8 and worked surprisingly well.
A little UV goes a long way, makes fluorescent paint light up like it’s on fire.
Stuck.
Or installed…
That’d be too easy.
Funnily enough, it was probably a 405nm “purple” LED vs even 395nm, but was still pretty decent. Still lit up things like Pine-Sol, mail-stickers, “PAID” stickers, etc., just fine.
At a “mine” I once went to (don’t ask), people would go explore the tunnels that seemingly would go on forever featurelessly, and if you got turned around in there, forget it, you’d likely never get out. Overly possessive locals would screw with “outsiders”, even to the point of trashing markers to help you backtrack (“breadcrumbs”). Even things like chalk marks would get smeared over or erased.
One method to make sure you could still find your way would be to spritz UV dye after you pass vertical posts. Any yayhoo with a flashlight wouldn’t see anything, so nothing to smear. ’Though on your way back, you could see nigh forever with a UV thrower, as the tunnels would still be “black”, but would light up the UV spritzes like fire.
Wish I had a WK30 back then…
I will use this thread, if I’m allowed to ask a couple of questions related to UV flashlights.
I am looking for 1 of 2 things. I either need a UV flashlight for solder mask curing or if there is some flashlight that can give me normal cold white light (6400k or something like that) and also UV light. I would also like to ask, if solder masks requires specific UV wave length or if it is ok to choose 365nm, 395nm or whatever!
I should say I bought a few UV leds in Aliexpress, rated at 395nm, built a small array of leds with a simple driver but I’m not sure if the LEDs are in fact of 395nm, if they even are UV or if they are some fake crap. I say this because I tried to cure a solder mask and it took quite a while, like more than 20 mins.
So, in short:
a UV led flashlight for solder mask curing
or a flashlight that can switch between UV and normal LEDs.
My budget would be around 20€ or something like that!
Thanks
The Weltool M2 flashlights I have throw pretty far. The M2-BF which has the black filter (zwb2) doesn’t throw as far. But the M2-CF and M2-OL throw pretty far. They are about $78 on Amazon with battery and charger. They are also built very solid. My only complaint is it only has 2 modes, low and high. I guess Anduril has spoiled me.
The Lumintop Tool AA UV is pretty throwy. Has a nice filter to that blocks non-UV lights.
sparkyDK, thanks for started this thread.
i will be reading the responses, since, i, too,
would like a battery powered, handheld UV light
which projects at distance AND fits into the Budget classification.
I guess I’ll create a new thread as anyone seemed to have replied to my question and I don’t want to invade this thread!