These Glowing Magic Powerballs are fluorescent. They glow when illuminated by a black light. Certain pigments in the balls are phosphorescent. When the lights are turned off, the balls continue to glow.
Glowing Magic Powerballs
By Anne Marie Helmenstine, Ph.D., About.com Guide
Shining a black light on magic powerballs makes them glow brightly in vivid neon colors.
Anne Helmenstine©2010 About.com, a part of The New York Times Company.
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