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Early Sodium Lamp Designs
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Updated
20-IV-2013 |
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| This page features some of the earliest designs of low pressure sodium lamps. The original versions were only made in small quantities and were often more laboratory curiosities than commercially significant products. As such a very broad variety of different types was created. By 1932 however, most of the worlds manufacturers had arrived at the optimum design for this category of lamp, and the below types were superseded by the SO/H lamps having a positive column discharge in a U-bent tube. |
| | Low Voltage DC |
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Philips |
82W |
| Philora DC 4000lm - First Sodium Lamp |
| 1932 |
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Philips |
82W |
| Philora DC 500lm - Small Polarimeter Lamp |
| ~1940 |
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| | Low Voltage AC |
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GE |
190W |
| NA-9 10,000lm - American-style Lamp |
| 1952 |
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GE |
28W |
| NA-1 650lm - Small AC Lab-Arc Sodium Lamp |
| 1960 |
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| | High Voltage AC |
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Philips |
80W |
| Philora DO80 Positive Column Cold-Starting |
| 1932 |
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Philips |
80W |
| Philora SO500 Positive Column Self-Starting |
| c. 1935-1940 |
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