I have numerous double-bulb fluorescent light fixtures in my home, and as far as I can tell, they were installed in 1968. I believe the ballast was replaced in the kitchen light several years ago.
For the most part, they have operated fine in all this time - but when it rains, and the humidity is very high - they will not start up. You can see the ends glow a bit, and sometimes you can flip the switch back and forth a bit and get them to come on, but they usually won’t light up.
The five lamps in the garage are this way, as is the one in the kitchen. I have changed out bulbs, but it doesn’t help. If it is a rainy day, the lights may start up slow or with a little prompting the first few hours, but as the day progresses, they will not fire up. Really cold weather also can sometimes add to the problem.
These lights have been this way for many years, and it isn’t much of a problem, but it is irritating.
Is this just a matter of a ballast replacement?