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  1. New Member Introductions
    Today I installed 4 sets of Philips Advance mark 7 GZT-2S32-SC ballasts into old fixtures. 2 of the sets came on fine and the other 2 not so much. They are on separate circuits which are shared with the rest of the floor. The 2 unworking sets have the first light in the row turn on for a...
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