
84 Electrical Discharge Lamps
electromagnetic waves with a frequency depending on the metal of choice and its
signature energy-level structure.
MX
n
↔ M + nX
Μ + e
–
→ Μ*
→ M
+
+ 2 e
–
M* → M + hv
Figure 3.49. High-pressure sodium vapor discharge lamp (Reux with a high
special side reector 250 W).
80
700600
High-Pressure Sodium (Standard)
Wavelength (nm)
500400
0
20
40
60
80
100
Figure 3.50. Emission spectrum of a high-pressure sodium vapor discharge lamp.