Try to find some of those old bulb-saver discs. They cut down the inrush current which is what really stresses the filament. The discs are a rectifier or thermistor in a small round tab you put in the socket before screwing in the bulb. They've helped me when I couldn't track down the cause of frequent burnouts.
You might find you need to go with a hotter bulb since the discs reduce consumption and light output slightly - ~25%.
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There are a vast number of people who are uninformed and heavily propagandized, but fundamentally decent. The propaganda that inundates them is effective when unchallenged, but much of it goes only skin deep. If they can be brought to raise questions and apply their decent instincts and basic intelligence, many people quickly escape the confines of the doctrinal system and are willing to do something to help others who are really suffering and oppressed." -Manufacturing Consent: Noam Chomsky and the Media, p. 195
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