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Old 08-15-2008, 11:03 AM   #1
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metal halide lighting problem
I just replaced 8 (all) metal halide 175's in a gymnasium-all was well for the first week, now two of them only glow blue upon energizing the switch. Is that indicative of a ballast problem? Observed behavior was greater than 5 minutes-the remaining 6 lights lit with no problem during the same time frame. No flickering of lamp (overheat indicator).

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Old 08-15-2008, 04:20 PM   #2
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Have u tried using one of the good lamps in the fixture that's not working correctly?
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