My garage has several shoplights with the older type of fluorescent dual light fixtures, 4 feet long, 40 Watt, thicker than the modern ones.
Both lamps went dead. I replaced only one of the lamps because it is difficult for me to reach above my head. However, the new single lamp in the fixture does not burn steady. It flickers mightily and also turns on and off intermittently.
Does this mean the ballast is bad and that I should replace the fixture with a more modern one?.
Thanks
Walter