sodium-vapor lamp
noun
so·di·um-va·por lamp
ˈsō-dē-əm-ˈvā-pər- 
: an electric lamp that contains sodium vapor and electrodes between which a luminous discharge takes place and that is used especially for lighting highways
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And the older sodium-vapor lamps also cast a very distinctive yellow or yellow-orange light.
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Elizabeth Weise, USA Today, 29 Mar. 2025
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Elizabeth Weise, USA Today, 29 Mar. 2025
Cite this Entry
“Sodium-vapor lamp.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sodium-vapor%20lamp. Accessed 22 Jul. 2025.
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