"Loose or arcing connections anywhere in the circuit path could do the same. Even, and especially the ones right at the bulb.... An A-19 for instance with a med. base not firmly screwed in will arc at the hot connection inside, and blow pretty quick."
would have any effect on lamp life.
I have heard it said by quite a few people but I have always doubted the facts of this.
Bob Badger Construction & Maintenance Electrician Massachusetts
