Hi..Typical 2' 2 lamp flourescent fixture.I got called to a residence for a bad fixture. I replaced the fixture and still lamps still glow dim. I ran through the typical....lamps fine... voltage fine... polarity fine...The one problem I did see was the old cloth romex.(No Ground).As far as I know the ground sould not have any effect on the the fixture.I could be wrong...maybe the ballast needs the ground??? Any ideas.....????