My Grandpa used to go around the house at night turning off all of the lights all the time.. We would all be sitting in the living room watching TV and Grandpa would be walking around, turning off lights.. grumbling..
Not about the electric bill.. but about people breaking in. Which was a little crazy since my grandparents house was in the middle of 10 acres.. 5 of which was swamp..
Yeah.. his thing was break ins.. He used to tell us this:
Don’t leave all the lights on at night for the burglars to see what they are going to crash into…