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Balast lights some bulbs, not others
 [ 4 Answers ]
 
At work I have a large sign at the front of the building which contains a large ballast and 6, 6' fluorescent bulbs. Everything was working fine last week, but this week only two of the 6 bulbs light up, even after replacing every bulb. Does anyone have any clue what could be happening? View more questions Search 
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