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

Too Expensive but it works well.

Well made

It works great! and decent quality

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.

Found this light to be a great option for going through a room and discovering where my cat has peed. The battery has never gone out on me so far so not sure how long it lasts but it has been getting the job done. The construction of the light itself is also very good and has that nice solid metal feel.My only complaints about the light would be the positioning of the on button (I can never find it when the lights are off) and it could be a little brighter so it could be used with the lights on.Overall, this one is worth the bit of extra money over one of the cheaper alternatives from Amazon that I tried previously.

I bought this as a replacement to an old fluorescent blacklight for detecting cat urine stains on carpet. It is vastly more powerful; while the fluorescent needed to be an inch or so away from the stain, this will light things up at a distance of a foot or more even during the daytime (afternoon shuttered light in the house during full sun, low enough that you'd probably want a reading lamp to read but which would be fine for reading labels or just being at home). The problem is (which has nothing to do with the product), it lights up ALL organic type compounds so by itself you can't differentiate between old/treated and new stains unless the cleanser had no organics that would also fluoresce under UV light.I wanted a bright light (preferably from a reputable company but not overly expensive) that would easily pick up cat urine stains, and this was perfect. If I ever lose it, I will buy another. I haven't used it enough to comment on battery life, though.The UV glasses are a nice touch.

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.

Works great and less expensive than convoy. Found a yooperlite the first time I used it out in the field.