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frontpageiconian | Staff posted Dec 02, 2025 04:40 PM
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frontpageiconian | Staff posted Dec 02, 2025 04:40 PM

DARKBEAM 365nm UV Flashlight LED Black Light (USB-C Rechargeable)

$7.00

$14

50% off
Amazon
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Darkness Beam via Amazon has DARKBEAM 365nm UV Flashlight LED Black Light (USB-C Rechargeable) on sale for $13.99 - $7 (apply promo code HYOIM6RA at checkout) = $6.99. Shipping is free with Prime or on $35+ orders.
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Thanks to Deal Editor iconian for finding this deal.

Editor's Notes

Written by megakimcheelove | Staff
  • Rated 4.7 out of 5 (66 global ratings)
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Original Post

Written by iconian | Staff
Product Info
Community Notes
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Deal Details
Product Info
Community Notes
About the Poster
Darkness Beam via Amazon has DARKBEAM 365nm UV Flashlight LED Black Light (USB-C Rechargeable) on sale for $13.99 - $7 (apply promo code HYOIM6RA at checkout) = $6.99. Shipping is free with Prime or on $35+ orders.
  • Note: Promo codes are typically for one-time use and don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.
Thanks to Deal Editor iconian for finding this deal.

Editor's Notes

Written by megakimcheelove | Staff
  • Rated 4.7 out of 5 (66 global ratings)
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.
  • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion. 

Original Post

Written by iconian | Staff

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Top Comments

DealSeekerDeal
2460 Posts
364 Reputation
365nm is often considered superior because it produces less visible light, making the faint glow of urine stains more distinct. Stains will appear as a pale yellow or greenish color under the light. Specific wavelengths, often in the blue-violet range (\(415-490\) nm), can cause semen stains to fluoresce (glow) and be visualized. A 395 nm wavelength is best used for applications like creating blacklight effects, curing certain UV resins and adhesives, and detecting fluorescence for things like counterfeit money, animal stains, or antique glass.
qualitypixel
44 Posts
14 Reputation
Yep. Also good for looking for cool rocks, scorpions, and other weird bugs. I've used my UV lights mostly for hunting for cool rocks.

Looks like this darkbeam does not include safety glasses. Get some as the rays are harmful, especially for your eyes. 3M Safety Glasses Solus 1000 Series block 99.9% UV rays but you can still see anything that fluoresces under the UV.
IndigoWinter2667
2016 Posts
679 Reputation
Scorpions also glow in the dark.

44 Comments

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Dec 02, 2025 05:44 PM
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scdiamondDec 02, 2025 05:44 PM
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for hotel rooms?
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NavyShop802Dec 02, 2025 05:54 PM
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Quote from scdiamond :
for hotel rooms?

You won't like what you find.
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Dec 02, 2025 05:54 PM
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avocetDec 02, 2025 05:54 PM
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Quote from scdiamond :
for hotel rooms?
Yeah but sometimes there are things you're better off not seeing or knowing about.
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Dec 02, 2025 06:03 PM
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LivelyWallaby1957Dec 02, 2025 06:03 PM
76 Posts
You can make your own luminol at home to play crime scene cleaner simulations.
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Dec 02, 2025 06:12 PM
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SevenDsDec 02, 2025 06:12 PM
104 Posts
Can someone remind me is 365 or 395 better, thanks.
Dec 02, 2025 06:19 PM
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IndigoWinter2667Dec 02, 2025 06:19 PM
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Quote from scdiamond :
for hotel rooms?
Scorpions also glow in the dark.
3
Pro
Dec 02, 2025 06:29 PM
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DealSeekerDeal
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Dec 02, 2025 06:29 PM
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Just Remember: Once seen - can't be forgotten....
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Dec 02, 2025 06:31 PM
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DealSeekerDeal
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Quote from SevenDs :
Can someone remind me is 365 or 395 better, thanks.
365nm is often considered superior because it produces less visible light, making the faint glow of urine stains more distinct. Stains will appear as a pale yellow or greenish color under the light. Specific wavelengths, often in the blue-violet range (\(415-490\) nm), can cause semen stains to fluoresce (glow) and be visualized. A 395 nm wavelength is best used for applications like creating blacklight effects, curing certain UV resins and adhesives, and detecting fluorescence for things like counterfeit money, animal stains, or antique glass.
13
Dec 02, 2025 07:06 PM
22 Posts
Joined Feb 2015
askirk87Dec 02, 2025 07:06 PM
22 Posts
Quote from IndigoWinter2667 :
Scorpions also glow in the dark.
My kids love these for seeing scorpions at night. In for one. Thanks!
1
Pro
Dec 02, 2025 07:36 PM
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RyzenPrime
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Dec 02, 2025 07:36 PM
1,158 Posts
don't waste your $$$
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Dec 02, 2025 07:55 PM
12 Posts
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fhvac27Dec 02, 2025 07:55 PM
12 Posts
If you have pets you can use it to see previous leaks and stains that may need to be cleaned
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Dec 02, 2025 07:57 PM
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psaturn7Dec 02, 2025 07:57 PM
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Quote from RyzenPrime :
don't waste your $$$
that is what we do at Slickdeals !
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Dec 02, 2025 08:27 PM
795 Posts
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GalahadDec 02, 2025 08:27 PM
795 Posts
Quote from fhvac27 :
If you have pets you can use it to see previous leaks and stains that may need to be cleaned
I have one that never shown anything expect dust and small particles.
1
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Dec 02, 2025 08:31 PM
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douflagDec 02, 2025 08:31 PM
2,201 Posts
Will this be good for curing certain liquids? Like window chip filler?

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Dec 02, 2025 08:40 PM
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Danzilla
Pro
Dec 02, 2025 08:40 PM
9,703 Posts
Quote from RyzenPrime :
don't waste your $$$
If you don't buy such a deal, you're LOOSING money!!!

Most of these cheap UV lights are either really weak, or aren't that great at UV and produce all kinds of visible light as well (ie purple-ish light). The fact it looks like they're using a UV pass filter is a good thing... if it's real and not just tinted to pass LF visible light as well.

EDIT: Looks like power is mentioned, in a side panel with product information. it's a 10W light with 1300mW intensity, according to the manufacturer.
Last edited by Danzilla December 2, 2025 at 01:55 PM.
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