MIU COLOR Black Light UV Flashlight, Small UV Blacklight with 21 LEDs, 395nm, Compact Handheld UV Flashlight for Dogs Urine Detector and Scorpion Hunting

Works well. I use it for invisible ink.

the lights are great on this and its very well made., starts curing the nail glue so fast

Great value, and puts out a tin of light. I bought a Harbor Freight one with only 9 LED's for the same price, and it's not worth it when you compare it with this one.

I bought this to review hotel rooms (I frequently travel) to make sure I got clean sheets. However, most cotton sheets illuminate equally. I've seen one or two that have a yellow (under the blacklight) covered pillowcases, but those have been at my parent's guestroom (so it's undoubtedly my drool, not a stranger's) and but what it's mostly good at it spotting less than clean carpet, sinks, and showers. It does work very well for that, though. The problem is that even under the black light, it takes quite a bit of scrubbing (which suggests the hotel staffs haven't been slacking, just that it took more than they understood). So unless I want to bring scrub gloves and a whole cleaning kit, the amount of grime I've seen is acceptable. Except the carpets. Ew. Nothing to do about that, though.

Nice metal construction. Really make spills and urine stand out especially in low light.

Unpacked flashlight and installed batteries and would not come on. After checking the battery orientation which was correct the first time I clicked the on off button many times and it started to work. Strange. I guess buy at own risk????

Works great!

Mine didn't turn on. I tried the batteries both ways. I returned it for a refund. If you purchase it, make sure it works before the return period lapses.

Very weak light. Only good for checking hand held things like currency notes or documents. Not suitable beyond two feet.