In the 18th-century, various experimenters noticed that an electric discharge in rarefied gas gave a light. However, it was not until the beginning of the twentieth century that the phenomenon was exploited practically.
The Moore tube, introduced in 1895, was a carbon dioxide filled tube up to sixty metres long, which gave a white light. The very long tube was not suitable for general illumination, but after 1905 the tubes were shaped into letters for illuminated advertising. Nitrogen tubes which gave a pink light were introduced at about the same time, while red neon lights were introduced in 1910.
Such lights were not widely used until the 1920s. The first low-pressure mercury arc lamp was developed by Peter Cooper-Hewitt in 1901, but it was never widely adopted.
In the 1930s, however, the high-pressure mercury vapour lamp, operating at about atmospheric pressure was introduced. The types of glass then available could not withstand the operating temperature. It was found that quartz was suitable because it has a higher melting point than glass and can be moulded into a strong vessel, but new manufacturing techniques were required since it behaves differently from glass when heated.