It's the little things that drive you nuts.
We've got a light fixture over our kitchen sink. For the first three years of its existence it worked flawlessly. We keep it on 24-7 as a night light and for accent.
The fixture used one bayonet type florescent lamp. It's on the same circuit as the dishwasher and disposal.
About six months ago the lamp burned out. We replaced it and it worked fine. A month later, the new lamp burned out. This repeated about four times when we finally decided to replace the fixture entirely, figuring there was something wrong with it (faulty ballast?) instead of the bulbs. Now we have an incandescent fixture with a single 40 watt candelabra bulb.
These bulbs burn out with the same frequency, about every 3-4 weeks. So now I think there's a problem with the wiring.
I've looked around at some DYI forums and one fellow had the same problem for years. He said he fixed it by going to the panel. The neutral wire to that circuit had repeatedly heated and cooled and worked itself loose. He said he retightened the neutral connection and the problems stopped.
I'm not at home right now so I can't check, but does this sound like a possible solution?
-Frank