USB Plasma Ball: A USB-powered globe filled with lightning that
Plasma globe - Wikipedia
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This iconic scientific lamp was originally created by Nikola Tesla in 1894, following his experiments with high voltage currents. The plasma ball demonstrates the properties of electrical discharges, which you can control with your fingers as you touch the lamp. The globe is a sphere that has most of its air replaced with 3 noble (inert) gases – neon, argon and xenon.
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6 inch Extra Large Plasma Ball, Special Blue Light, There are many different sizes of plasma ball on the market, 3/4/5/6 plasma ball. This 6 inch
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Smithsonian 5 Plug-In Plasma Ball
Tesla's Lamp – Exploratorium