The golden yellow glow that has dominated the night for generations is disappearing.
Low pressure sodium has been the standard technology for outdoor lighting for generations. the soft yellow glow is familiar to anyone who has lived in any urban area, coloring lives and countless photographs of the night.
The yellow glow of sodium light has been both celebrated and reviled. While the glow can be attractive in night scenery it also creates inhuman tones in faces and photos of people. Movies have been shot under sodium lights, songs reference the golden glow. Astronomers both professional and amateur prefer the lights as the light can be easily filtered from view.