I also read it a bedtime story

I usually try and be fairly energy conscious around the house -- turn of lights when I'm not in the room, that sort of thing. But that's not always a viable option, for instance when I'm prepping panels for paintings and I need the gesso to dry in my cold dank basement. Everyone knows paint won't dry quickly without light. This is because it's afraid of the dark. If there isn't a light on, it wets itself.