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How to make a powerful flash powder from a box of simple matches Video: . If you buy cheap matches in bulk, you can get around 50 grams, a little short of 2 ounces of powder for 1 dollar. 50 grams is enough to make 3 very powerful firecrackers, 2-3 grams of properly contained ...more

So these LEDs glow in an orange. HOW? Video: . Most likely 120 - 230 volts AC applied. Why LEDs that need 2-3V DC glow? Without burning out?