What is the Nixie Technology?
When a high voltage (170V) is applied between the anode and one of the cathodes, the gas in the Nixie tubes is ionized and forms a kind of of plasma. Much of the light that shines from a Nixie tube is generated by collisions between gas atoms, ions and electrons, just like in a neon tube. When they collide with atoms, they produce photons of visible light that create this warm glow just behind the cathode.
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