Noun
sodium lamp (plural sodium lamps)
A sodium vapor lamp.
It is a common experience observing "glare" and "fog" around and below LED road luminaires as soon as air humidity increases, while orange sodium lamp luminaires are less prone to show this phenomenon. Source: Internet
Ordinary stage lighting is used in combination with a bright yellow sodium lamp. Source: Internet
The most efficient source of electric light is the low-pressure sodium lamp. Source: Internet