ALONEFIRE SV003 10W 365nm UV Flashlight Portable USB Rechargeable Woods Lamp Black Light for Pet Urine Detection, Resin Curing, Scorpion, Fishing, Minerals, Cure Glue, Bed Bugs with Battery, Charger

Just opened this flashlight and despite not having another UV flashlight to compare this to I would be willing to argue that this one is the best bang for your buck.Pros:- Bright in UV terms- is small and light-most definitely 365nm if not shorterCons:-Gets hot within 5min-Connection between battery isn't ideal, may need/want to run a wire from tip of spring to connector.-Can not mod/or completely disassemble without the u-shape pin tool (cant remember what they are called)-Is extremely dangerous to skin and eye sight. This is very important for you to know, I feel this flashlight is emitting dangerous levels of UV radiation. I would not under any circumstances point this light at anything reflective that would shine back into your eyes or shine this flashlight at anyone closer than 50ft of you if at all. This is a weapon and should be treated as such.-365nm to my understanding was a safe UV wave to shine at myself or at people for a couple seconds at a time. Now like I said I have just opened this flashlight. I have not hurt myself or anyone else since opening it. I am scared to put this light on my skin and I feel my glasses will be a necessary thing to wear when I am using this light strictly because of the power this thing has. That being said, I do not know how power of the light vs lightwave range effects damage to your body especially at 10 watts-Now I know the flashlight says warning this and that but my understanding is that 365nm is a UVA light that would have a tough time giving you a tan even under long exposure times. This flashlight will melt your vision in seconds.-I have never purchased anything in my life so underrated. To achieve their supposed 365nm they put a filter over the LED that only allows short wave to pass through the lens. Which is really confusing because of the extensive research I did prior to buying this flashlight have convinced me that you need quarts to achieve such short waves so I had my doubts about this method. Which begs the question, what nm is this flashlight actually capable of with a quarts lens and how short of wave can or is this LED capable to achieve? My guess is an extremely dangerous levels. Not sure if this is actually a con...Recommendations to AloneFire:-This flashlight needs more cooling-Would love to see this in a C8 flashlight with a quarts lensFinal thoughts:I got these flashlights for cheap and they do exactly what I need them to do and my worry of a buying a cheap flashlight that could not achieve 365nm was immediately put behind be as soon as I turned it on. Build quality was as expected for a cheap flashlight (good enough). Would highly recommend this flashlight with an extreme caution of the warnings listed above. Hope this helps

My wife and I had a great time today playing CSI around the house with this UV light. Cat urine lights up even on dark surfaces. Perfect for finding cat pee and also loads of fun for CSI fans.

It does exactly what it says. I got it to find pee spots left by my sick elderly cat, who has sadly since passed away from cancer. It works a million times better than the longer wave UV lights on the market, which barely even made urine spots visible and I was still having to crawl on my hands and knees (probably through cat pee) to find them. Like it's not even a close comparison, the 365nm light lit up my house like a CSI crime scene and is a clear winner.If anything it works too well, because it illuminates every trace of dirt in my house, including where my lazy house painter didn't clean the walls and now all the gross stains are entombed beneath a layer of paint for all eternity. But somehow this flashlight sees through the paint and makes them glow, to my dismay of my OCD.It also illuminates other cool things like jewelry (fun science fact - many common gems like diamonds and rubies fluoresce under UV.)I suggest wearing UV eye protection while using because it's that flipping strong and you don't want to burn your retinas out.

On a whim I decided to buy this. For $25 not a huge loss if it turned out to be a piece of junk. So far, I don't think that's the case. It uses a standard 18650 Li cell so it will be easy to find replacements if the LED(s) don't burn out first. Using the supplied charger and plugging it into a regular port of an Anker Quick Charge 3 wall wart https://smile.amazon.com/Anker-PowerPort-Charger-Charge-PowerIQ/dp/B01N2HIR9R/ it took probably 5 hours for the battery to charge. The LED in the charger turns from red to green when the battery has been fully charged.I could find no reference showing correct installation polarity for the battery so I installed it like a regular flashlight, namely positive in first. The endpiece containing the on/off switch threaded smoothly into the housing and has an o-ring seal for water resistance. The on/off switch has a good, solid mechanical feel with positive action. It's either on or off. There is no momentary on position. This is a good thing considering the amount of current the light is pulling. The light came on so the polarity was correct and man was it bright! It lit up things all throughout the apartment and easily made things glow in other rooms 20+ feet away. The light's output is filtered so no visible light or fluorescence is emitted.The housing is heavy black anodized aluminum. After running the light for a couple minutes, I could tell that the housing was getting warm. Because of the high current draw, power dissipation from the LED is high and heatsinking is a must. That's where the aluminum housing comes into play. If it weren't aluminum, and say, plastic, it would melt down on you! This unfortunately is the light's weak point. You need to pay attention to how hot it gets. Not so much for being burned, but the lifetime of the LED will be significantly reduced the hotter it gets and the longer it runs hot.While I've only had the light a couple of days and haven't had the need to recharge it yet, it's an impressive device and could be useful for many applications. I might actually buy another to bring into work because we use UV cement to bond optics and this light would be strong enough to do a large area cure instead of needing to use a 1/4" spot lamp all the time.