The first question you want to ask yourself when purchasing a blacklight flashlight is, “Do you really want to know?” These neat little gadgets employ ultraviolet light to make substances containing phosphors glow in the dark, so you can find out whether or not the carpet in your new apartment has been properly cleaned, if there’s evidence of bed bugs in a hotel room, or spot counterfeit cash. Enjoy these tips on what they can do (make sneaky scorpions gleam blue-green) and what they can’t (remove said scorpions from your shoes), and even have some fun discovering a hidden world.
