Yep, I've tried the halogen light bulbs, but they die nearly as quickly.
I'll give my local power company a call, but I imagine it may have more to do with the house than anything, as I do live within the city.
No vibrations that I'm aware of, I suppose a helicopter flies overhead relatively often (hell, one just crashed a couple blocks away a few weeks ago) but no trains or large aircraft...
I appreciate the input, folks