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Thread: Questions about UV lights

  1. #1

    Default Questions about UV lights

    I work in the pest control industry. I am looking to pick up a good UV light to use for inspections for rodents and bed bugs. I am looking at the Nitecore MT1U at the moment but was wondering if there are better options available?

  2. #2
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    Default Re: Questions about UV lights

    Engenious Designs FyrFly - superior output, comes with visible blocking filter for better contrast, same price zipcode...

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    Default Re: Questions about UV lights

    Check out the EagTac P200LC2 UV - I picked one up recently and it is an excellent light powered by an 18650 cell and with 3 levels of brightness. I am very happy with it and would buy it again for whatever that is worth.

    Cheers,
    Tim
    More Lights Than I Care to Admit but Not Enough to Stop Buying!

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    Default Re: Questions about UV lights

    The magic term is 365nm wavelength. This is the classic "black light" wavelength. The less expensive 395-405nm near-UV lights put out a lot of visible purple and thus don't fluoresce things as well.

  5. #5

    Default Re: Questions about UV lights

    Quote Originally Posted by PhotonWrangler View Post
    The magic term is 365nm wavelength. This is the classic "black light" wavelength. The less expensive 395-405nm near-UV lights put out a lot of visible purple and thus don't fluoresce things as well.
    I have read this in doing my research.
    Thank you.

  6. #6

    Default Re: Questions about UV lights

    Quote Originally Posted by CobraMan View Post
    Check out the EagTac P200LC2 UV - I picked one up recently and it is an excellent light powered by an 18650 cell and with 3 levels of brightness. I am very happy with it and would buy it again for whatever that is worth.

    Cheers,
    Tim
    This looks like a good option.

  7. #7

    Default Re: Questions about UV lights

    My Nitecore P20UV works well and is according to the packaging a 365nm UV light. It also has an XM-L2 for white light. Only downside is that is has a battery spring on only one end, the head side has no spring at all.

  8. #8

    Default Re: Questions about UV lights

    I don't know about rodents, but I use a uv light for finding leaks in automotive fluids with dye.

    There was another thread here that recommended this light with the 365 Nichia led, I bought it.

    https://www.gearbest.com/led-flashlights/pp_277704.html

    I haven't tried all uv lights, but this is the best I've ever used. Just use some clear uv blocking goggles with it. Note that it does not include a battery.
    Last edited by syga; 11-03-2019 at 12:54 AM.

  9. #9
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    Default Re: Questions about UV lights

    Quote Originally Posted by PhotonWrangler View Post
    The magic term is 365nm wavelength. This is the classic "black light" wavelength. The less expensive 395-405nm near-UV lights put out a lot of visible purple and thus don't fluoresce things as well.
    At the low end, at Home Depot I recently got a 3AAA UV flashlight for $6; uses multiple cheap 5mm LEDs and shows a fair
    bit of visible, but good to play around with. Also nice that it can take an 18650.

    I don't have specific use, but notice they are good for detecting scorpions! I will check under my bed right away!

    4.5h / 1m drop resistance 9 LEDs Great for Leak Detection, Reading Fluorescent Inks, Detection, Scorpion Detection
    (3) AAA BATTERIES INCLUDED. UV Light
    .

    Going way back, my first UV light was a modest cost lab-use device using mercury tube and filter. Two versions were
    offered, 3660A (366nm, "long wave") and 2537A (253.7nm, "short wave"); I got the latter. Original use was finding
    fluorescent minerals; later to erase UV EPROMs. I had fun making day-glow posters and powdered detergent
    (with optical brighteners) light up in the dark. It still works.


    Dave

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    Default Re: Questions about UV lights

    Quote Originally Posted by Dave_H View Post
    Going way back, my first UV light was a modest cost lab-use device using mercury tube and filter. Two versions were
    offered, 3660A (366nm, "long wave") and 2537A (253.7nm, "short wave"); I got the latter. Original use was finding
    fluorescent minerals; later to erase UV EPROMs. I had fun making day-glow posters and powdered detergent
    (with optical brighteners) light up in the dark. It still works.

    Dave
    Your experience matches mine almost exactly, I also used SW for finding fluorescent minerals and erasing eproms. I even discovered some phosphorescent rocks in our own driveway. They glowed a pale bluish-green after I turned the light off. That was the coolest thing.

    And today those shortwave lamps can double as germicidal devices, especially with the filter removed.
    Veni vidi velcro

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    Default Re: Questions about UV lights

    Quote Originally Posted by PhotonWrangler View Post
    The magic term is 365nm wavelength. This is the classic "black light" wavelength. The less expensive 395-405nm near-UV lights put out a lot of visible purple and thus don't fluoresce things as well.
    Old tube lamp is Ultra-violet Products UVS-11. Verified it works and have a spare tube from an air purifier.

    In a Canadian Tire store I saw a set of UV LED "inspection lamps" which are just over-sized penlights; one 365nm, other 395nm. Don't recall the brand/price, will try to get more info next visit. Can't seem to find it online and some of their webpages hang my browser for some silly reason.


    Dave
    Last edited by Dave_H; 03-17-2020 at 08:26 AM.

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    Default Re: Questions about UV lights

    Quote Originally Posted by Dave_H View Post
    In a Canadian Tire store I saw a set of UV LED "inspection lamps" which are just over-sized penlights; one 365nm, other 395nm. Don't recall the brand/price, will try to get more info next visit. Can't seem to find it online and some of their webpages hang my browser for some silly reason.


    Dave
    Interesting. I have yet to see a true 365nm LED flashlight in a regular retail store. Was the "inspection" lamp intended for detecting A/C leaks or something else?

  13. #13
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    Default Re: Questions about UV lights

    Quote Originally Posted by PhotonWrangler View Post
    Interesting. I have yet to see a true 365nm LED flashlight in a regular retail store. Was the "inspection" lamp intended for detecting A/C leaks or something else?
    The 365nm/395nm inspection light pair is made by/for an outfit called "Police Security". Not bad at CDN$25 but I didn't bite. At least one of the two is offered separately.

    Package mentions currency checking and leaks for 365nm; blood/urine/scorpions (!) for 395nm.

    Dave

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    Default Re: Questions about UV lights

    Checking the cheap Home Depot "Defiant" flashlight specs, no wavelength is spec'ed. Package
    shows a glowing scorpion which is leading me to think it is 395nm.(**)

    Found Coast UV 1AA flashlight PX100 which actually specs 400nm.

    Side note, I watch a fair number of "who-dunnit" detective series main from England, Scotland, Ireland,
    Australia, New Zealand etc. In Murdock Mysteries (Canada) Det. Murdock employs a crude (at the
    time, early 1900's) UV lamp for detecting blood; in a wooden box, portable.

    Dave

    ** hmmmm...shouldn't scorpions get compensation for their role in selling these products...they're not even on the payroll!

  15. #15
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    Default Re: Questions about UV lights

    Quote Originally Posted by Dave_H View Post
    Side note, I watch a fair number of "who-dunnit" detective series main from England, Scotland, Ireland,
    Australia, New Zealand etc. In Murdock Mysteries (Canada) Det. Murdock employs a crude (at the
    time, early 1900's) UV lamp for detecting blood; in a wooden box, portable.

    Dave
    I'm guessing it was an incandescent lamp with a woods glass filter. G-E used to make a 250 watt incandescent with the glass envelope made out of Woods Glass. It was a brute force way of getting some usable UV, but it ran so hot that it could only be used intermittently per the specs.

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