ALONEFIRE SV18 12W 365nm UV Flashlight Powerful USB C Rechargeable Woods Lamp Black Light for Pet Urine Detection, Resin Curing, Minerals, Fishing,Scorpion, Bed Bug with UV Protective Glasses,Battery

Works great. Shows fluorescence nicely. Doesn’t get too warm, especially if you use it intermittently. It’s sturdy and handles dirt well. Overall solid for the price!

Light is super bright! It illuminates all my uranium, cadmium, and manganese glass very well. It’s a little bigger than I was expecting but I didn’t check the size so that’s on me. Seems sturdy and well made, the battery compartment in the back screws in and out to hold the battery (I should mention, battery is included! Woo hoo!)

I already had a UV pen light, but wanted something bigger. Then, I bought this. This thing will light up an entire back yard full of whatever could possibly glow when UV light hits it. I have a large back yard. Do not under any circumstance aim this thing at anyone's eyes! There is a warning label on the head of this flashlight for that reason. Don't get it too close to skin either. It will burn. The head of this light will even make for a hand warmer during the cold of winter. Another bonus is that you can remove the 21700 battery, and replace it if it goes bad. Or, put it on an external charger, prolonging the battery life.

This is amazing very bright works better than the ones I have bought in the past. Nice quality. And good price.

Received with broken UV glasses, kind of a bummer. The light is a nice machined metal construction unit consisting of battery tube, base and head. Feels good in the hand and has a lanyard for safety.Doesn't come with any instructions and amazingly I haven't seen any posted so I'll note that after a full charge 1 press of the button is full power, press again after 3 seconds and get low power, again and it's off. Or, pressing it twice in quick succession turns it to strobe.It seems fairly powerful, low power is what I'll use for indoors. Only had it a day so can't speak of it's longevity..

Very high output power compared with several other units that I have.A nice not expected feature: It has a threaded socket for a tripod mount.Only negative: There is no battery status LED.I am a very happy user.

This is a very nice UV flashlight. It's very bright and the battery lasts a good long time. I used it for rock hunting and it works well on rubies and sapphires. It fits very well in the hand and is easy to turn on and off. Just what I needed.

After reading an article in The New York Times (The Glowing Secret that Mammals Have Been Hiding), I wanted a UV light. I researched UV lights and selected this one because it emits light that is a true UV wavelength, not the longer violet wavelength, and the battery does not have to be removed to be charged. I charged it up and waited until dark to explore my house - which I thought was relatively clean. I was not ready for what this revealed. That place where the cat puked on the carpet months ago, was highly visible - more cleaning required. The toilet, after 26 people descended on my house for Thanksgiving, was no longer clean. The areas that needed cleaning were not visible in daylight, but this light still identified them clearly even in daylight. The glass bottle that was found in the rafters of my over 100 year old house glowed green - which I found was due to uranium in the glass. My jewelry fluoresced in a variety of colors. It's been so much fun discovering what fluoresces and what elements cause the different colors. This is a great educational tool for the curious student. I would not recommend it for young children (less than 10 years old) because of the dangers the UV light poses to the eyes and skin, and the light gets hot after a few minutes. I don't know how long a battery charge lasts.