The flip-side of it being the world's longest lasting light-bulb is that every other light-bulb made alongside it has burnt out by now. Its longevity is most l

The flip-side of it being the world's longest lasting light-bulb is that every other light-bulb made alongside it has burnt out by now. Its longevity is most likely due to a unique confluence of factors, not simply because of a robust design produced before the concept of planned obsolesce, as is often alluded to whenever the subject is brought up. I also suspect its longevity is helped by all the delicate care and attention it has been given since people realized that it has been running for so long. It has a dedicated power supply, it is under-powered, and great care has been taken not to damage it. Normal lightbulbs never get such a luxury. It is certainly possible a newer lightbulb has already been produced that will burn for twice as long as the Centennial Light. We just won't live long enough to see it.