Many of the lights for the Carrolton branch of the Canal Street Streetcar line stay on in the daylight. This is wasteful in electricity, money, and for its contribution to the warming climate.
From where I took the accompanying picture one can see about a dozen sets of lights on. (One additional light is peeking through the palm tree in the photo.) The picture was taken at 2pm!
This kind of waste can accumulate to very significant amounts, and I'm willing to bet that this is not the only place this is happening.