UV flashlights are essential tools for verifying the authenticity of currency. This guide explains how to use them effectively, with insights into features, comparison tables, and tips to optimize results. How UV Flashlights Authenticate Currency UV flashlights emit ultraviolet light, typically at a wavelength of 365nm or 395nm, revealing security features embedded in genuine currency. These features include: Fluorescent Threads: Embedded UV-reactive fibers or threads. Watermarks: Invisible under regular light but visible under UV light. Holographic Elements: Special UV-responsive areas. Step-by-Step Instructions Step 1: Choose the Right UV Flashlight Recommended Wavelength: Use a flashlight emitting 365nm or 395nm UV light [...]