I recently bought a Rotel 1080 amplifier and this is the 1st amp I have owned. When I first turn on the amp, my ceiling lights go off for a flash of a second and then come back on. Someone told me that this is something I shouldn't worry about but that he leaves his amp on all of the time. I have been turning it off every time I am done using it. Is it OK to leave it on all of the time? Is it better to leave it on all of the time or does it not make a difference?