> Light bulbs made 100 years ago are still working today This is a bit of an urban legend. There is indeed a lightbulb that has been running for >100 years I t

> Light bulbs made 100 years ago are still working today This is a bit of an urban legend. There is indeed a lightbulb that has been running for >100 years I think, but it is nearly never cycled. And that's what kills filaments, not continuous running.