GearLight UV Black Light Flashlight S100 [2 Pack] - Mini Blacklight Ultraviolet Pen Lights for Leak and Hotel Inspection - Pet Urine, Bed Bug, Scorpion, Stain, and Dye Detector

I carry one of these at work every day. Lightweight, not blindingly bright but bright considering the size. Batteries seem to work for a long time.

Small and fits right in the glove box, works great for it's purpose and was a decent price.

This light put out more UV than my older multi led light. It charged up my glow in the dark fishing jigs in seconds and easily detected leftover leak detection dye from an automotive ac system under daylight conditions . The aluminum body and machined threads are high quality and the lens is recessed to help prevent scratches. The design does a good job of dissipating heat however I am not sure what the lens material is as I do not wish to go that far with the disassembly. On the visible part of the internal curcuit board there appears to be some excess solder flux leftover from assembly and circuit board breakouts are a bit rough. On my example one of the breakout points has a slight interference with the cap threads but that's just me being really picky and does not hinder function. Nothing a quick pass with a file can't fix, especially important for someone with my level of ODC. Also, the spring steel pocket clip can be reversed or removed if needed. I put some dielectric grease on the cap threads and o-ring seals, put one in my tackle box and the other in the garage. I have no reason to believe these lights will not serve me for years and for the price I don't think it can be beat.

They are small but worked great

Holy cow this is my favorite new adult fidget toy. It has more weight than a pen and the soft click button to turn the flashlight on and off is very, very satisfying. I work in a place that uses UV lighting and UV reactive décor. This light is so handy for testing out colors in my art and 3D materials. The flashlight is best for the personal range but can reach across a room. If all the lights are turned off and in an enclosed space, the flashlight can illuminate objects at least 20' away. The packaging warns that this flashlight cannot detect cat urine. I disagree. My cat's urine shows up under the blacklight (see review pic). So does the egg residue on my unwashed frying pan (also in review pic). Soap and biological matter typically shows up under average range blacklight frequency and I'm thrilled to see this blacklight picks up on all the color ranges I'd like to see. The only issue is that my cellphone camera doesn't see violet very well at all. So the pictures turn out very blue while the human eye would show more violet. That's not the fault of the blacklight though.