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Originally Posted by gregzz4
Are these recent failures replacement ballasts, or more old units failing ?
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All three PFO ballasts were brand new, and the Galaxy's as well. That's six ballasts total.
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Originally Posted by gregzz4
Have you tried testing the supply voltage during start-up ? A voltage drop/low start-up voltage will fry a ballast over time
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I tested the voltages after the failure of the first three, everything seemed to be fine, nothing looked out of range.
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Originally Posted by gregzz4
Have you opened any units to determine what is failing ? Capacitor/windings
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I haven't but I have two most recent failures I can crack open.
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Originally Posted by gregzz4
Maybe a dumb question but, are you matching the recommended bulb types ?
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I'm running 400W DE HQI Bulbs and Ballasts