Leaving my amplifier on ok?

I run Hegel amps and wondered the same thing after reading so many different opinions.  Questioned Hegel directly and was told to turn the amps off when not in use.  They said leaving them on only shortens the life of electrical equipment.  I listen to music every evening and turn the system on about two hours in advance.  

@curiousjim  You are correct about the standby mode in many of the Hegel amps.  Unfortunately,  My H30's don't have the standby option.  It's on or off and nothing in between.  

After reading so many differing opinions on this subject, I asked the manufacturer, in my case Hegel, if there was any harm caused by leaving my H30 Mono amps powered on 24/7, and is the rush of current at startup more harmful than constant power. Their answer was this. The amps are not damaged by the on/off cycle. They recommend waiting 60 seconds between turning on, if you have turned off. They did advise against leaving powered on 24/7 citing a waste of electricity and shortened life span due to constant heat. Therefore in my own case, I turn off after listening and turn on a couple hours in advance of my next session.

Maybe someone could answer this question for me. Define "shortened" lifespan. My previous Parasound power amp lasted 20 years without any issues and then I sold it. If shortened lifespan means lasting 25 years instead of 30, then I’m now too old to care as either one will out live me.

Since the argument against leaving your SS amps on 24/7 is the damage caused by heat (mostly), what is the temp of your equipment both when in use and when idling?  At Idle, my Hegel H30 measures +/- 90F on the warmest part of the case and 100F is the warmest temp I can shoot inside the case.  When in operation, both go up about 10 degrees F.  It would seem my equipment would suffer more heat damage sitting in Pheonix completed turned off.