Sodium lamp
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Description
A type of high intensity discharge lamp in which excited sodium vapor is the illumination source. Sodium lamps produce sharp intense emission lines at 589 and 589.6 nm. This gives a bright yellow-orange, glareless light that is used on streets, highways, lobbies, parks, and malls. Sodium vapor lamps have a high initial cost that is offset by long lifetimes and low energy requirements.
Synonyms and Related Terms
sodium arc; sodium vapor lamp; sodium-vapor lamp; sodium-vapour lamp (Br.); high pressure sodium lamp
Resources and Citations
- T.Brill, Light: Its Interaction with Art and Antiquities. Plenum Press, New York, 1980.
- Encyclopedia Britannica, http://www.britannica.com Comment: "lamp." (accessed 24 Jan. 2005).