Review on 🔦 LE 21-LED 395nm Black Light Flashlight for Invisible Ink Detection, Pet Stain Identification, AAA Batteries Included by Theresa Grieve

Used (unofficially) to verify paper invoices. The color bars are wonderfully bright and clear. What I didn't know until now was that even one dollar bills have the authentication stripe embedded in the paper. Also for showcasing stains from body fluids, urine, blood, etc. Some public restrooms are disgusting as hell for lack of cleaning, and the black light makes you really conscientious about using hand sanitizer!