dave w,I haven't had one die yet how ever I'm not one to leave lights on for long.
I do know they out live my old incandescent bulbs at least.
As for light output I haven't seen that reduce yet either but they are much less brighter to begin with
![Sad :(](http://forums.x10.com/Smileys/default/sad.gif)
The brightness stated on the packaging is no where true to what I actually get.
![Cheers >!](http://forums.x10.com/Smileys/default/happy065.gif)