How to Make UV Light Out of Your Phone's LED Flash

In a recent episode of MacGyver, an improvised ultraviolet light was created from an LED. How would this work and what is a blacklight?

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Make a UV Black Light at Home : 5 Steps (with Pictures) - Instructables

Black light UV Light Simulator - Apps on Google Play

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Turn Your Smartphone into a Portable Black Light [How-To]

Phone / Flashlight to UV Light Hack!! (Works with any light!)

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How to make a UV (black light) with your cell phone light

Ultraviolet Black Light

2-In-1 Ultraviolet Black Light Body Fluid Detector Portable Dual LED Flashlight Handheld UV Blacklight

Make a UV Black Light at Home : 5 Steps (with Pictures) - Instructables

AdamStar UV Flashlight Black Light, 3-in-1 Magnetic Flashlight Rechargeable, 1000 Lumen Tactical LED Flashlight, 7 Modes Waterproof UV Light Flashlight for Camping Emergencies Pet Urine Detection

This Hack Turns Any Phone into a Black Light « Smartphones :: Gadget Hacks