OzOne wrote:

You think that leaving a light on will make it burn out?

http://www.centennialbulb.org/facts.htm

It's all about cycles...

While the lack of cycles no doubt contributes to the longevity of that
particular bulb, the fact that it's a dim 4 watt bulb with a low
temperature filament is the determining factor for longevity.

Higher temp in the filament means a shorter lifespan. The easiest way
to prolong the life of a bulb is to have a lower temperature filament,
the problem is that you need high temps to produce white light. In this
case, the bulb barely glows a deep red, which is enough for a nightlight.


//Walt