There are combination longwave/shortwave UV lights that have either two fluorescent tubes or a single "split" tube that produces both 365nm UVA and 254nm UVC. They're sold as mineral prospecting lights. I've never seen a tri-band LW/MW/SW UV light, although it's certain;y possible to produce one.Hello all, I was reading an article on insects and some of them have UV markings that show up under different wavelengths. Is there such a light that has multiple wavelengths?
I had to look this up myself awhile back, and do some experimentation.I saw some things like orange filters, how do those work? Block the light emitted, or does one need glasses?
Isn't the filter just to reduce eye damage?I had to look this up myself awhile back, and do some experimentation.
TL;DR:
A light without a filter also emits blue light that decreases the UV-effect. Use yellow UV safety glasses to block the blue light from hitting your eyes.
A filter on the light blocks the blue light emitted from the LED, and only lets through the UV wavelength. Use clear UV safety glasses for eye protection.
A filter on the light or wearing yellow glasses basically does the same thing, which is blocking blue light.
If you get a UV-light that comes with a UV-filter, you do not need yellow glasses (other than the recommended clear UV-protective safety glasses).
But if the light does not have a filter, yellow glasses reduces the amount of blue light that hits your eye, and you will see the UV-effect better.
I use "3M Secure fit 3700" UV safetly glasses, with clear or yellow glass, depending on whether the light has a filter or not.
Using yellow glasses with a UV-light with a filter will only reduce the perceived effect of the UV.
If the filter on the flashlight were to protect against eye damage, then it would have to limit the UV-output. Which would rather defeat the purpose of a UV-light.Isn't the filter just to reduce eye damage?
Purple is a combination of red and blue. I suspect a blue led might make it stand out against the background, but blue will also fluoresce some things which would add to the visual clutter. If that happens, try a red LED instead.it would be a purple phone. I was hoping the screen would reflect somehow
If you're referring to this one, I have it.Has anyone here own Sofirn SF16 luminous SST-08 365nm, Zwb2 lens.
I'd like to know what is reach on high beam?
The 21700 should prove to be more powerful beam.If you're referring to this one, I have it.
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SOFIRN SF16 365nm UV Flashlight
Product manual, click to download! 1. High Performance: The UV flashlight has a wavelength of 365 nm and operates at 875 mW in its High mode. Fluorescence is strongest around 360 nm wavelengths. This makes it easier to detect pet urine stains on carpets or other stains that are invisible to the...www.sofirnlight.com
Just tested it, though not in complete darkness. Reached about 7 meters.
I intend to buy one of these (Convoy S12 UV, 21700, with Seoul Z5-CUN66A1G and ZWB2-filter) Soon™, to compare:
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Convoy S12 UV 365nm with filter 21700 flashlight
Due to patent restrictions, UV flashlights with filters cannot be sent to the United States!convoylight.com
Sorry, I must have missed that edit. Comparing to Emisar's electronic switches, the SF16 tail switch definitely feel mechanical. There is that distinct *click*-sound when you press it.Btw, does the Sofirn SF16 have a mechanical rear switch in tailcap, or is it electronic?
Technically, if you zoom in far enough, every switch is mechanical, it's just that some don't work if you let the magic smoke out.Sorry, I must have missed that edit. Comparing to Emisar's electronic switches, the SF16 tail switch definitely feel mechanical. There is that distinct *click*-sound when you press it.
A review on Sofirn website confirmed it's not only mechanical, it's a reverse clicky. I really don't know what's the reason for having a reverse clicky on this low amp UV flashlight?Sorry, I must have missed that edit. Comparing to Emisar's electronic switches, the SF16 tail switch definitely feel mechanical. There is that distinct *click*-sound when you press it.
While reverse clickiesA review on Sofirn website confirmed it's not only mechanical, it's a reverse clicky. I really don't know what's the reason for having a reverse clicky on this low amp UV flashlight?