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GE 250w HPS Lamps
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Here's a couple of used and still working HPS lamps that were also from the two streetlights in my collection. Looking at the date code both lamps were made in March 2002 and installed later on in August 2002. They were in service until mid March of 2010, that's around 7 years and 7 months of dusk to dawn service O_o.
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