Neon lamp advertising or a glass tube that is planet fire and then, bending, or letters. There is no filament, but at the end, both sides will have the metallic electrodes. The generator high voltage of about 10,000 volts inside the tube to pump the air out completely, then put some gas to light in different colors come out when there is electricity through the neon gas, such as red light or orange. Helium gas, light pink high voltage will cause the gases in the tube as the ion occurs and conductive. When the electric current through a gas, gas, heat, light in different colours.
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