Surprisingly bright, portable, and won't disappoint. They are water-resistant, fit in your pocket, and also include a strobe light mode.
UV Flashlight 395nm Ultraviolet Torch With Pen Clip Portable Use AAA Batteries
Alonefire SV005 Powerful 10W 365nm UV Torch Ultraviolet Light Flashlight...
UV Flashlight LED Ultraviolet Torch 395/365Nm Zoomable Pet Stain Detector Tool
