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A plasma lamp
Touching a plasma lamp changes the discharge patterns

A plasma lamp is a type of gas discharge lamp that is filled with different gases. It uses dielectric barrier discharge, which is also known as plasma discharge. Nikola Tesla invented it to study the properties of plasma, in 1892. He obtained a patent in 1894. Tesla called the lamp Inert Gas Discharge Tube.

Plasma globe lamps were popular in the 1980s.