wrote in message
oups.com...
Have you tested the voltage at the sockets? Use one of those screw-in
socket-to-outlet adapters.

Any reason why one of the bulbs might get hotter?

Maybe only 'that' bulb touches the fixture, or the globe.

Maybe 'that' bulb doesn't screw in so tight and is more prone to
vibrations.

For grins, try leaving the globe off for awhile and see if there's a
difference.

Dave

Light bulb heat is not a bulb life factor until the bulb glass melts.
Wonder how that urban myth got started?

Shock/vibration is the most likely culprit -- doesn't take much once the
bulb has burned for a while. Tungsten gets brittle.

Suspect high voltage only if other bulbs in the house burn out too fast as
well.

TKM