Low pressure sodium lamps (part 2)
GEC 90w SUPERSOX lamp
GEC and Thorn 35w SOX lamps
1960's GEC 60w SOI-H lamp
GEC 60w SLI-H lamp
Osram GEC 200w SLI-H Lamp
1970's GEC 90w SUPERSOX lamp & Modern Osram 90w SOX Lamp
Later 1990's Osram 18w SOX lamp
Modern Osram 18w SOX lamp
Late 1980's Osram 35w SUPERSOX lamp with White Cap & Nickel plate rim
Early 1990's Osram 35w SOX lamp with White Cap
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