Low pressure sodium lamps (part 4)
Early 1990's Osram 26w SOX-E lamp
Later 1990's Osram 26w SOX-E lamp
Modern Osram 26w SOX-E lamp
Early 1990's Osram 36w SOX-E lamp
Modern Osram 36w SOX-E lamp
1940's Philips 60w SO-H lamp
1950's Philips 45w SOI-H lamp
Philips 35w SOX lamps have a Brown Cap
Philips 18w SOX lamp
Philips 35w SOX lamp
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