sodium-vapor lamp



  • (written as sodium vapor lamp)
    An electric discharge lamp that produces light when sodium vapor is activated by current passing between two electrodes. Commonly used in street lights, they can take three to four minutes to warm up to full light output.


  • A discharge lamp in which the light is produced by ionizing sodium vapor. Such a lamp provides a characteristic yellow light, and is used, for instance, for outdoor lighting, such as that of streets. Also called sodium lamp.