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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
Filename:New_Russian_lamp_013.jpg
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
URL:https://allthingslighting.co.uk/atl/displayimage.php?pid=2990
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