This yellow light was once widely used for street lighting but has lost popularity to the high-pressures sodium lamp. It was developed in 1920 at Westinghouse, and commercialized by Philips in 1932. The low-pressure sodium lamp is also known as an "LPS" lamp. It is still widely used in certain cities like Bogota, San Diego, and some European cities. Learn about how the lamp starts, warms up using argon and neon, and vaporizes the solid sodium.
6 сен 2024