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Georges Claude, French chemist and engineer, invented Neon lighting (died 1960)

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Georges Claude
French engineer, inventor & Nazi collaborator (1870–1960)
Georges Claude was a French engineer and inventor. He is noted for his early work on the industrial liquefaction of air, for the invention and commercialization of neon lighting, and for a large experiment on generating energy by pumping cold seawater up from the depths. He has…Source: Wikipedia (CC BY-SA)
Neon lighting
Electrified, rarefied gas lighting
Neon lighting consists of brightly glowing, electrified glass tubes or bulbs that contain rarefied neon or other gases. Neon lights are a type of cold cathode gas-discharge light. A neon tube is a sealed glass tube with a metal electrode at each end, filled with one of a number…Source: Wikipedia (CC BY-SA)