ALONEFIRE H42UV 36W 365nm UV Flashlight USB Rechargeable Ultraviolet Blacklight Torch Pet Urine Detector for Resin Curing, Fishing, Scorpion with UV Protective Glasses, 4PCS Battery Included

Outstanding performance with a rugged all-metal design! The flashlight can illuminate stains, etc. even in a room with daylight, though it won’t work outdoors in the sun. It features two intensity levels and uses four removable rechargeable Lithium batteries. The batteries can be charged within the unit itself via a USB-C connector, so there’s no clutter from an external battery charging station. A charging cable is included but a USB charger is not supplied. A yellow tinted pair of glasses is provided for eye protection against UV light, and the entire kit is packaged in a nice presentation box suitable for gifting. When shopping for a UV flashlight, the number of LEDs is not as important as the total lumens output from those emitters. Many flashlights also use only a single lithium battery which simply can’t drive the LED’s with enough current to get a bright beam. This model does not suffer from those limitations… definitely worth the price!

I wanted a UV light to find urine stains from my puppy and decided to get this. There are tons of these types of lights but are cheap and I didn’t want a weak light. I do admit this was probably a little overkill for me as I’m not in the hospitality industry and don’t use this on a regular basis. It’s a pretty thick light and has weight to it. It definitely puts out good light and has two brightness settings. I wouldn’t advise exposing your eyes or skin to this as you can feel it on your skin as soon as it shines on it. If you’re looking for a light to use a lot, this seems like it will work good for heavy use. I’d recommend this light but, it is a bit much for the average consumer.

At the the time of this review, this is probably the best widely available UV torch. Very thoughtfully designed and very well built with super output. It produces true 365nm UV with very little visible light. Reactive objects are revealed even from 50 foot distances. The charging capability is convenient, however unlike some lesser designs, the batteries can be still removed for external charging. The 4 included batteries are genuine, good quality, full capacity, 18650 batteries, ...not inferior knockoffs. Its a great high quality light that's hard to beat in this price range.

I use this product for night-time mineral exploration. It's seemingly- tough, and has survived many drops while in operation. The USB-C plug seems to be the only weak point (outside of the obvious glass front,) with mine not working any longer after about 20 charge cycles. Not a big problem as I have dedicated Li-ion chargers, but still frustrating to a small degree. However, the flashlight has basically stopped working. Freshly-charged batteries, and in order to make it work, I have to smack it, and still the power switch shows a red light instead of the typical green light. Upon opening the light (it simply unscrews) and looking at the driver board with my electronics microscope, all three ICs seem to have internal damage near the pins connecting to ground (see first image.) The switch transistor/MOSFET appears fine and all resistors and capacitors look functional and test okay on my multimeter. In terms of physical construction, the light is wonderful, but I think a different set of ICs or perhaps more thermal regulation/removal on the driver board itself is needed to address my issue with this light.

I already bought the alonefire SV003,10w 365nm to hunt for fluorescent minerals, and was very pleased. When I saw this BEAST, I was immediately on board! After unboxing this high quality nmonster, I quickly turned it loose on my favorite calcite specimen. I am blown away by the performance for the value, and can't wait to field test this bad boy. You want this light if you are hunting for chicken eggs, pet urine, fake money, scorpions, bedbugs, as well as cool glowing rocks! Definitely sharing.Picture shot on OnePlus 8 12mp. Alonefire h42uv 365nm on low setting.

I purchased this flashlight based on its specs. 365NM uv light is suggested for finding pet messes. this light has 4 rechargeable batteries that don't need to be removed from the light to charge. It has 2 power settings with up to 6000mw of output. It will illuminate stains in a fully lit room and up to 20 feet away. I wave not used it long enough to test the batteries endurance.

I use it for spotting tomato hornworms at night feasting on tomato leaves and fruits. The worms fluoresce bright green and are easy to spot. Be sure to wear the supplied safety glasses. Even though 365nm is mostly out of the visible spectrum, it's obvious that the light produced is powerful and can probably damage the eyes. The 'flashlight' itself is made from heavy duty aluminum with o-rings to keep water out and powered by 4 rechargeable lithium batteries.

The triple UVEDs in this flashlight give a very bright illumination of fluorescent minerals, with a wide footprint unlike some more expensive LWUV lights on the market. The battery life, even with 4x 18650s, is therefore not the longest because a large, bright footprint doesn't happen with low battery energy. But it's worth it - just carry spare batteries.