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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most of the worlds manufacturers had arrived at the optimum design for this category of lamp, and the below types were superseded by the SO/H lamps having a positive column discharge in a U-bent tube. |
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![](Images/HID Thumbnails/t D SLP Philora 4000lm.jpg) |
Philips |
82W |
Philora DC 4000lm - First Sodium Lamp |
1932 |
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![](Images/HID Thumbnails/t Philips Philora Sodium DC.jpg) |
Philips |
82W |
Philora DC 500lm - Small Polarimeter Lamp |
~1940 |
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| | Low Voltage AC |
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![](Images/HID Thumbnails/t D SLP GE NA9 with asbestos.jpg) |
GE |
190W |
NA-9 10,000lm - American-style Lamp |
1952 |
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![](Images/HID Thumbnails/t D SLP GE NA-1.jpg) |
GE |
28W |
NA-1 650lm - Small AC Lab-Arc Sodium Lamp |
1960 |
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| | High Voltage AC |
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![](Images/HID Thumbnails/t D SLP Philora DO80.jpg) |
Philips |
80W |
Philora DO80 Positive Column Cold-Starting |
1932 |
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![](Images/HID Thumbnails/t Philips SO300.jpg) |
Philips |
80W |
Philora SO500 Positive Column Self-Starting |
c. 1935-1940 |
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