HPS Lamp or ballast

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conmgt

Senior Member
How does one tell if a lamp is causing a problem or the ballast.
In particular, a parking lot HPS fixture is extinguishing for 2 mins and then relighting and staying lit for 30 min to 2 hrs and then extinguishing again and then relighting and so on.
I called a major ballast mfg. and the person who answered said "Put a new lamp in and if the problem remains...you need a new ballast" Ummmm gee thanks!
 

conmgt

Senior Member
Excellent references from both. The AEL servicing guide is fantastic. The Wiki was straight to the point. Thanks to both for your response
 
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