What protective eyewear do you recommend for when using high power UV lights?
Lol, just like white led lights I just don’t look down the barrel
It could still reflect a portion of that light, although it’s not that intense.
150$ for a single led? I bought mine at 4$ each from aliexpress.
The real question is what is the stain on draw door? lol Fire hosed it? Been playing helicopters?
I mean no offence when I ask this but we’re you able to verify you got 365nM ? AliExpress doesn’t give me a whole lot of confidence.
I got some more rough phone pics. I recently got my daughter a decent camera… see if I can train her up to be my photographer
I tried to gather a few colourful things together. It appears I don’t really have a lot of fluoro stuff. Some of the colours I would have expected to pop more but they didn’t. I really have no idea how that works. The difference between the turbo and mid pics below indicate that the camera is getting washed out to me (is that the right term?)
Turbo
Mid
Turbo with filter
Some glow powders and tape
Mid
I think this was Turbo or high with filter
And just plain glow (no uv light)
Be nice when I find a real world use for this…
There are some decent 365nm LEDs on mouser with a 3535 XP type footprint, price is still double what you paid for these though. Specifically talking about the Lite-on 365nm UV and the Luminus SST-10 365nm UV.
Those cheap 365nm leds from aliexpress are between 365 and 370 nm, so close enough. The cheap features are that the output is ok but not great, and that they produce a white/yellow-ish waste light as well, that obscures the fluorescence that you usually want the UV for. Nichia 365nm leds are the best for producing almost no visible light.
A high output and fairly cheap 365nm led (more 365nm light than most Nichia’s) that does produce some visible light is the LiteOn 365nm led (available at Mouser and tme.eu). The visible light can be filtered out with a ZWB2 filter.
Btw, the plastic optic from the DQGtiny26650 likely absorbs a lot of 365nm light, so it was wise to go for 395nm.
I was aware that some optics can interfere with the uv but i’m not fully versed with what goes on.
Normal TIRs will be absorb most 365nm and get burned
i had an itch for high power uv, build this one.
i build the light, this weekend will try it outdoors. i actually recovered more leds than i expected, cat only destroyed 2, others were saved by thick reel, enough for 4 triples, all wired in parallel, fed by 6a linear driver. white leds in the center ( has no optics, basically, the beam pattern is horrible, with dark spots everywhere, but it does pretty good job at illuminating dark spaces. it also wont blind if you look directly into it. only 3 triples have white leds, all parallel too, 4,5A…
What protective eyewear do you recommend for when using high power UV lights?
I also have the same question.
Do those cheap anti-UVA/UVB ‘polarized sunglasses’ (many such sunglasses/night vision glasses in Banggood, for instance) offer some protection against UV light?
depends a bit on what wavelength. The 395nm light from the light in the OP needs yellow /amber glasses, the 365nm leds can be be blocked quite well with common polycarbonate glasses (most ‘impact’ glasses used in workshops and labs are made of polycarbonate).
A quick test is always: shine the UV-source onto a sheet of copier paper, all UV sources should make it fluorescence bright blue. Then place the glasses in between light source and paper and see how much fluorescence is leftover, good glasses make it almost gone.
I use uv strips on my boat for night fishing and some of the strips from China last about a month don’t know about individual leds anf how they will hold up in long run.
I used a cheap $5 pair of yellow-lensed safety glasses from Wal Mart with my 395 UV light and they worked very well. They effectively blocked the majority of the visible blue making fluorescence pop much more vividly. Even dark items were more dramatic, such as leaves that fluoresced red, and tiny mushrooms and other fungus that was washed out in the blue. They also passed the paper test Djozz mentioned; shining through the lenses would eliminate fluorescence, and my eyes could feel the difference too.
I mean no offence when I ask this but we’re you able to verify you got 365nM ? AliExpress doesn’t give me a whole lot of confidence.
I got some more rough phone pics. I recently got my daughter a decent camera… see if I can train her up to be my photographer
It’s close enough, just like djozz said. I bought a whole bunch of different wave lenght uv leds from there from 365 to 410 so I know the difference they make. Only the 365nm led was able to match the performance of my mini uv cfl lamp when checking currency.
The case with aliexpress is that everything depends on the seller. Some are genuine while most others are not. Remember Convoy and Soshine have their official stuff sold through Ali.
Normal TIRs will be absorb most 365nm and get burned
Oh crap, I didn’t know this, was planning to use mine with a TIR.
PMMA TIR wont work there was a picture here in BLF that showed a ruined triple optic and LEDs were damaged as well
PMMA is a nice base material for deep UV protection glasses below 375nm
Polycarbonate glasses absorb anything below 395nm
Wow, so I’m really just lucky I used 400nm and not 365nm
PMMA TIR wont work there was a picture here in BLF that showed a ruined triple optic and LEDs were damaged as well
PMMA is a nice base material for deep UV protection glasses
it sure does work, i’ve build few uv lights using pmma tir lenses. have leds run for hours, no issues whatsoever.
i thinki know what picture you talking about, however it shows carclo triple, which is made of polycarb.