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Create Your Own Black Light With Your Smart Phone And Tape!
You have probably seen black lights at amusement parks, science museums and Halloween displays. Black lights may look just like normal fluorescent lamps or incandescent light bulbs, but they do something completely different. Switch one on, and white clothes, teeth and various other things glow in the dark.
Black lights also let you see if someone has wiped up blood and other human excrement that you may not see with the naked eye. This is a real eye opener. Create your own and go exploring in your own home. What you see may shock you.