Fluorescein

How To : This Hack Turns Any Phone into Black Light

Black lights come in all shapes and sizes, and are useful in a variety of ways—they can help you spot fake currency, urine stains, interesting rocks, deadly scorpions, or even just some cool fluorescent artwork. Most black lights work using a filter or coating over the bulb t ...more

How To : Make Glowing Green Candy

If there ever was a day to eat green candy, St. Patrick's Day would be it. But is there something better than the banality of green candy swarming the streets on St. Patty's Day? Yes—glowing green candy, and Instructables user BrittLiv wants us to show you how it's done. She ...more

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