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Some potential issues:
Improper grounding system in your house, although probably not due to its age.
Harmonic currents generated by other devices in your house such as lighting ballasts, computers, UPS's, added load to you grounded conductor system, neutral wires.
Vibration.
Too low of a voltage due to poorly installed wiring, or you houses location on the local grid.
Low voltage will cause an recriprical increase in amperage causing your lamps to fail faster.
Most electricians who work in residential construction will probably not be able to troubleshoot this issue.
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