Installed several (35) 6-lamp+4-lamp T5 high-bay lights six months ago in an auto dealership/service garage reno. Mechanics called me in to check one (6-lamp) out that was intermittently 'flickering'. I just ordered two new ballasts, one 2-lamp and one 4-lamp and replaced to be done with it. Noticed that a couple of the tombstones had loose wire leads in them. Could this be the source of the intermittent flickering? Or was one(or both) of the ballasts bad?
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