CooiLight 4 Pack UV Flashlights LED Black Light Flashlight Ultraviolet Urine Detector for Dry Pets Urine and Stains,Batteries Included

I’m bought this pack for training purposes - looking at nature through a UV lens. It shows flowers and minerals at night, scorpions, and other cool stuff that our eyes cant see but other things can. Very solidly built and was a good price for multi-pack. Strong light. You can also use it to see if your hotel room is disgustingly nasty, if that is what you need.

First impression from unboxing is that it was so small and light weight that it’s a toy, but after popping a Energizer battery in there it surprised me. For such a small light it’s pretty bright. So I needed a uv light bright enough to illuminate my glow fishing equipment and didn’t want it bulky. This was perfect, fit nice in my pocket and had well enough power to glow up my fishing tackle. Batteries that came with it worked but cheaply made. I’d buy it again and again

I own a cleaning company so I keep one of these in my bad to make sure i didnt miss anything in the bathroom. They work great and are small enough to take along wherever you need.

I bought these for my restaurants to check paper money for the UV band that indicates it is authentic and not counterfeit. The light is bright enough unless it the room is very bright.I like the small size and the fact that each flashlight only needs one battery, which were included!

Use these bad boys for glow disc golf/night play. Bright holds up good to water and the batteries have a great life. Recommend!

They all worked sometimes have to shake it a bit and the batteries they supplied are terrible-lasted about 10 min. I say go elsewhere.

I bought these to include with gifts for my grandkids, so they could have fun with the neon yarn items I made for them. 2 of the lights flicker,so poor battery connection.Will not order this brand again.

Some of them were able to pick up dog and cat pee, others were not. I think they need to validate the Quality Control for these little flashlights. Not all UV wavelengths are good for finding stains! One of the flashlights was great, another was ok and 2 didn't pickup anything.