So, you leave the living room to go grab a drink from the kitchen, and you turn the light off on your way out even though you are coming right back?
Fuck that shit. I always have a couple of lights on. Granted, the rest of the lights in the house are off and usually stay off, but I keep one on at all times in the kitchen, and a lamp in the living room. The usage for the streetlight is equally minimal. Who cares? I could leave every light in the house on all the time, and it still wouldn't make my power bill ridiculous.