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USSR 140W SO Lamp

Bubbles on the arc tube to keep the sodium in one place.

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File information
Album name:Dez / Low Pressure Sodium
Comments:I thought Philips was the only lamp company to use these plus Philips only used it on SO lamps for a very short time because they broke when putting the arc tube in the outer jacket.
Filesize:103 KiB
Date added:Sep 01, 2011
Dimensions:1280 x 960 pixels
Displayed:27 times
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