High pressure sodium vapour lamps having an aluminum oxide monolithic arc tube enclosed in clear or coated outer bulb with medium or mogul screw base.
A high pressure sodium arc discharge provides these lamps with high luminous efficacy and good colour recognition.
The clear bulb allows good optical control of the light while the coated bulb provide diffused light.
In addition, these lamps provide excellent lumen maintenance, long life, universal operating position and reliable, stable operation.
SPECTRAL EMISSION CHARACTERISTICS OF HIGH DENSITY DISCHARGE SOURCES (infra-red not included) -
Principal Lines (Nanometers)
MERCURY: 365-366, 405-408, 436, 546, 577-579
SCANDIUM: 391, 436-437, 474, 508-509
SODIUM: 466-467, 498, 569, 615-616, 600-650
ELECTROMAGNETIC SPECTRUM
Wavelength in Nanometers (10 Angstroms = 1 Nanometer)
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