UV 365nm and 395nm Light Wood's lamp Blacklight Ultraviolet Flashlight LED Portable Mini Handheld Torch, Detector for Dog Urine Pet Stains Anti-counterfeiting Identification, Resin Curing

Love that it has two different UV sources. Different stains fluoresce at different wavelengths, as well as different fabrics and surfaces reflecting different wavelengths. Sometimes using ~400nm causes too much violet reflection to provide the necessary contrast to see a stain. Switching to the 365nm source removes the violet/purple reflection and provides much higher contrast. Also, the button and battery connections seem to be solid, but time will tell. My last "cheap" UV flashlight had simple coil spring terminals and made very intermittent contact. This uses a nice gold-plated, spring loaded button. Finally, the zoom feature is awesome, you can project a relatively small (and bright) UV spot on a surface across the room, or go wide and cover the entire area around you on the floor. The only negative is that since there are two sources, the spot for each source moves a bit (several degrees) when zoomed all the way in, but it's easy to compensate for.

Ok I researched different black lights. If you're using this for CAT or DOG urine detecting this is the one to get. It has 2 different wave lengths, so cat urine shows up better on one wavelength and Dog on the other. Human urine/pee seems to show up on both with one a little brighter. We have both pets and let a stray cat into the house to get them acquainted and didn't work out so well, but he left his mark around the house. Shockingly we have a young male child in the household so it was shocking to see around toilet which objects it detects in human urine spray he has been off target on. So great to get that cleaned up. Light has held up and no other issues. Very pleased with purchase.

I purchased this to help me identify Vaseline glass and other kinds of phosphorescent glassware. It works incredibly well for that purpose and causes a very visible glow. The only thing I don't like about the flashlight is that it alternates between the two wavelengths by clicking the same button; there aren't individual buttons or a switch to keep it on a particular wavelength. But since there are only two options in addition to being off, it's not that big of a deal. Especially considering how inexpensive the flashlight is. It feels pretty durable in the hand. I've dropped it multiple times and I haven't managed to damage the casing or the lens. Overall, I'm incredibly happy with this purchase

At first, I didn't think it was much help. I tried it on dark, patterned rugs. But I gave it another shot and it is definitely great. It is easiest to see old dry pet stains on light carpets in the dark. My beige carpet looked purple except where the old dry stains were. They were easy to see. On dark, multicolored, patterned rugs it was difficult, I turned them over because the bottom was a lighter color. Found the spots on the backside, treated and flipped them and found the spot on the top and treated them. It is alot of work on dark carpets and I'm positive it will take me multiple treatments. (which I'm comparing as well) Ultimately, the best is to treat petstains immediately with enzymatic cleaner. But thats not always possible. I didnt want to destroy the color of my new dark rugs, hadn't spot tested cleaners and sometimes you don't find or know where the pet has been immediately. For old dry stains on light carpets. its excellent! More difficult on dark carpets.

The flashlight is sturdy, all metal and comfortable to hold. It has telescopic focus and two wavelengths ranges as described. To switch just push the power button lightly (do not click). Fits a pocket and great for travel. In a dark room will show/glow biologic fluids and organic matter like pet and human urine, shedded skin and hair, blood, saliva, semen, Blaschko's lines on the skin etc. Also invisible ink, markings on banknotes, spilled oils and antifreeze, fluorescent materials, scorpions and other insects, stains and cracks on minerals and gems, fluorescent plants and much more. Lots of fun with this light!! The darker is the room, the better is the visualization. The light came with a set of batteries and a wrist strap. Well Made in China.

Good portable black light. We use it to look for uranium glass at yard sales and antique shops!

When I was a kid you needed a car battery to power the UV light. I can only imagine mineral collecting in Franklin, NY with this flashlight.

I give it 3 stars for brightness and beam adjustment, but deduct 2 because the description says it has 365 and 395 nm wavelengths ("Double UV"), but it never illuminated any "yooperlites" for me. Another cheapo 365 nm penlight I used did work for yooperlights.