| 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. | ||
| Notes: | 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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