I think $.20 per kilowatt hour is not so bad. I think us audio people should be more sympathetic and not leave our equipment on all the time.
I turn on all my tubes about an hour before and they run for about 4 to 5 hours and then they go to sleep when I do.
Otherwise, I loath incandescent bulbs and think they have no place in your home and are grossly wasteful. And while many in the audiophile world may be a very wealthy nature I think we all should be concerned about Energy use.