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Light Sources, Second Edition, 2nd Edition
book

Light Sources, Second Edition, 2nd Edition

by Spiros Kitsinelis, Spyridon Kitsinelis
May 2015
Intermediate to advanced content levelIntermediate to advanced
295 pages
8h 16m
English
CRC Press
Content preview from Light Sources, Second Edition, 2nd Edition
74 Electrical Discharge Lamps
Figure 3.35. Electrode of a low-pressure sodium vapor discharge lamp.
80
0
700600
Low-Pressure Sodium
Wavelength (nm)
500400
0
20
40
60
Relative Spectral Power
80
100
Figure 3.36. Emission spectrum of a low-pressure sodium vapor discharge lamp.
Table3.9. Table with Indicative Values and Information about the General
Characteristics of the Low-Pressure Sodium Vapor Lamp
Gas ll Inner: 1% Ar in Ne|Na Outer: Vacuum
Luminous ux 4800 lm (100 h) 4560 lm (end of lifetime)
Efcacy 126 lm/W (100 h) 120 lm/W (end of lifetime)
Color temperature and CRI CCT: 1700 K CRI: Ra = 0
Color coordinates CCx: 0.574 CCy: 0.425
Average lifetime 20,000 ...
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Publisher Resources

ISBN: 9781482243673