Manufacturer: Osram - GEC
Model: SOX 35W
Application: Street Lighting, Security Lighting
Wattage: 35W
Diameter (max): 50mm
Length: 300mm
Tube Length: 420mm
Bulb/Tube material: Inner: Glass, sodium resistant inner coating.  Outer: Glass, indium oxide IR coating on inner surface.
Colour Temperature: 1700K
Peak output wavelength: 589nM
Total light output: Unknown
Rated lifetime: Unknown - 6000 hours estimated
Cap: B22
Operating voltage: 70V
Operating current: 600mA
Warmup/restrike time: 12 minutes/intentanious
Cost (original): Unknown
Value (now): Unknown
Place of manufacture: Shaw, England
Date of manufacture: Unknown - Late 1980s to mid 1990s estimate
Current Status: Failed.

A good example here of a low pressure sodium lamp which has operated a long and useful life before eventually expiring of old age.  The eventual failure mode being cracking of the arc tube near to one of the electrodes.  The lamp would then have flashed over (due to the outer envelope suddenly finding itself filled with the low pressure neon starting mixture from the arc tube) at the base and blown the fuse in the lamp cap due to the high current draw.


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This lamp added to the Virtual Display Shelf on the 14th November 2005 at 23:10.


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