COSOOS 2 UV Black Light Flashlight, 2 Pack 395nm Mini Pen Light with Clip, Waterproof Ultraviolet Flashlight for Leak, Pet Urine, Scorpion, Hotel Inspection, Dry Stain and Bed Bug.

These UV flashlights work as expected. They are inexpensive, lightweight, and easy to carry in a pocket or small bag. Build quality is basic but acceptable for the price, and nothing arrived damaged or defective. The UV output is usable and does what I needed it to do. That said, the color frequency seems slightly off compared to higher quality UV lights I own. It still lights up materials and surfaces clearly, just not with the same intensity or color accuracy as more expensive options. For casual or occasional use, these are perfectly fine. I used them to illuminate a few different items and included photos showing the results. They are convenient to keep around and work well enough for quick checks without worrying about losing or damaging a more expensive light. Overall, they are a good value if you want a simple UV flashlight that gets the job done without spending much money.

Works great. I bought to use to check clothing ahead of time for a black light event, and it was very helpful, because what I was planning on wearing didn't glow at all. Was surprised to see what items and materials glow and which don't - not all bright colors actually glowed. Would recommend. Then for fun started exploring the house, and it was so interesting to see. My pets were surprisingly not as messy as I thought, but my kitchen needs some more cleaning lol. Fun to play around with, seems sturdy and well made, pretty good amount of light, and I like the smaller size - about the size of a marker - which makes it easy to carry in my bag while thrifting.

I recently got the COSOOS 2 UV Black Light Flashlight 2-pack, and I’m really impressed with their performance and convenience. These mini pen lights are compact and lightweight, making them incredibly easy to carry around—especially with the handy clip that lets me attach them to my pocket or bag. The 395nm UV light is bright and effective for detecting pet stains, authenticating documents, and spotting hidden markings or bed bugs. Despite their small size, these flashlights pack a powerful ultraviolet glow that doesn’t disappoint. They’re also waterproof, which adds durability and versatility for outdoor use, or if you happen to drop them in damp spots. Battery life is solid, lasting through multiple uses without needing frequent replacements. Overall, the COSOOS UV Flashlights provide excellent value, combining portability with strong UV detection capabilities. The two-pack is perfect for sharing or having a backup on hand. I highly recommend these for anyone needing a reliable, compact UV flashlight.

Works great, I love it, but small enough I lose it. I do recommend purchasing, has held up for me outside, and handling animals. (I drop it, a lot)

I was skeptical at first. Thought why not. Getting ready for a big trip. Might as well see what I’m sleeping in. Lightning is very bright, it’s more of a spot beam. Have been gone for three months and though it doesn’t stay on long still shines bright. Metal construction holds up well, small so it’s easy to pack. Check out some pics. Not it’s not a giant beam but for quick, easy and lite couldn’t ask for more. Stayed at numerous hotels so far. Didn’t see anything and was beginning to think it was a gimmick. Checked into a hotel today. Boy was I wrong. This light works.

This is compact, made well, easily fits into my pocketbook. Works great!

Works great! But they’re a bit small, and easy to loose.

Great black lights. They dont take up a lot of space and has a great light. You dont have to worry about the lighting being too bright to use these