Low pressure sodium lamps (part 3)
Early 1990's Osram 35w SOX lamp
Later 1990's Osram 35w SOX lamp
Early 1990's Osram 35w SOX-Plus lamp with Orange Cap
Later 1990's Osram 35w SOX-Plus lamp with Red Cap
Modern Osram 35w SOX lamp
Modern Osram 35w SOX-Plus lamp
Early 1990's Osram 55w SOX lamp
Later 1990's Osram 90w SOX lamp
Later 1990's Osram 135w SOX lamp
Osram 180w SOX lamp
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