> Having worked on the HP 10816A rubidium clock 25 years ago,
> it is hard for my to believe the lamp alone could last 56
> years on the average. Even ordinary light bulbs don't last
> that long.
>
> Rick Karlquist N6RK
Reminds me of the extra-ordinary light bulb:
http://www.centennialbulb.org/
/tvb