I鈥檝e used this set of DARKBEAM UV flashlights a few times, and they seem to work as advertised. The dual 365nm and 395nm modes are handy for detecting pet stains and checking resin curing. The build quality feels solid, and the rechargeable feature is a big plus. I had issues with a previous set of Darkbeam flashlights not lasting long, so I鈥檓 hoping these hold up better over time. So far, so good! Will update if anything changes.