In article ,
"Peter R." wrote:

What are the odds that the bulb of this system *would* burn out the moment
you flicked it on? 1 out of a 100?

I'm pretty sure that bulbs have a better MTBF than that. I know I'm probably
(no pun) jinxing my airplane, but I haven't replaced a bulb in my airplane
in over ten years. The one exception is the landing light that I've replaced
once because of a cracked lens - the light still worked.

--
Bob Noel
no one likes an educated mule