Ekobesky,
It is a common myth that turning a light bulb on and off shortens it life.
There have been studies showing that turning your light bulb on/off numerous times per day (I can't remember the actual numbers in the test, but it was way more than you would ever do in real life) didn't decrease the life of the light bulb vs. just leaving the bulb on for extended periods.
Basically, it was proven that the light bulb will last longer if you turn it off when it is not needed and not to worry about the number of times it is turned on/off.
I don't know for sure if this also applies to audio tubes (especially NOS ones).
George
It is a common myth that turning a light bulb on and off shortens it life.
There have been studies showing that turning your light bulb on/off numerous times per day (I can't remember the actual numbers in the test, but it was way more than you would ever do in real life) didn't decrease the life of the light bulb vs. just leaving the bulb on for extended periods.
Basically, it was proven that the light bulb will last longer if you turn it off when it is not needed and not to worry about the number of times it is turned on/off.
I don't know for sure if this also applies to audio tubes (especially NOS ones).
George