Quote Originally Posted by ray hampton View Post
I had a similar problem with a ceiling fixture and the incandescent bulbs, I think that the fixture were being shaken by the furnace or fridge
You can get "rough service" incandescent light bulbs for such fixtures. A friend of mine had to do that in the pre-CFL era because the first floor ceiling/second floor had a little too much bounce to it, so light bulbs in the first floor ceiling just wouldn't last due to the vibrations from the kids running around upstairs (he probably had 5-6 kids then, up to a football side now).