I bought this to see if sunglasses have UV protection in the range of 365nm. Shining the light through sunglasses over a US $10.00 bill, the special markings on the bill did not show -- completely dark. Without the sunglasses, the special markings on the bill glow when the UV light was shined on it. At least my sunglasses block 365nm. The light also comes in handy to find out how clean a stove top is. Most things that are white strongly glow, and if any grease splatters are on the stove, the light vividly points them out. I really have to clean my kitchen. You can also see if your carpets need vacuuming, as small dots light up on the carpet to show debris.

The flashlight feels like it's made of high quality material, and it's easy to use. I would definitely give this as a gift and recommend it to others.

So I've had this for about a month now, and can now give my honest opinion. This light rocks! My buddy found a fist size peice of white opal at a hippy swap meet with it, it's potentially worth thousands of dollars and he got it for $25, the guy selling it didn't know what he had. I've found all sorts of interesting insects and rocks outdoors at night, the filtered 365nm output is extremely effective. I can't recommend this little light enough, it's bright as hell, filtered 365nm output, runs on cheap batteries for a long time, is well built, looks good, fits in my pocket great, I really can't think of anything bad about it. It's even priced well, I challenge you to find a light this good for less money. Get it.

I like higher end flashlights, and have owned many since my first incandescent Surefire sometime back in the mid 90s. I bought this light to replace a 2xCR123 powered UV light that that got lost, and I am very impressed with it. This little single light puts out a tremendous amount of UV and unlike my older light it does it with much less visible light and at a wavelength (265nmm) that really makes things fluoresce. At first I didn't think the light had that much output until it hit something that was highly fluorescent, and then wow....that object lit up the whole room! I wouldn't hesitate to recommend it.

I used the light for everything you had listed and then some. I bought it because it said that it did all of the things listed, so I did all the things listed, no one lied about this black light. I can endorse this Black light. Want your moneys worth and more by this light. When they say Wear your sunglasses it does mean all the time, or you will have headaches and very sore eyes. I found some gold flakes, antifreeze leaks, freon leaks, mold , cancer spots, dirty houses, beds, rugs, and much more, just the first day and night. Thank you I love it and love getting what I paid for, get you one , mine paid for its self in a few hours. And no I have not lied about anything.

I use this flashlight for various UV tasks - working on luminous clock dials, applying UV-fluorescent paint, pet urine detection - and it's by far one of the most effective I've found. It's more effective than the 18" UV tube light I was using and much more convenient since there's no AC cord. The black filter makes a HUGE difference in the UV intensity because there's much less purple visible light to interfere with the UV, and anything that's going to fluoresce will do so much more intensely.Very bright UV light, well-built and solid-feeling construction, highly recommended!