There's a footpath along the front of my house, just outside my bedroom window, which is lit up all night. Now, this is a very peaceful area, where people leave kids' toys, garden furniture etc out all night, and where the worst that has happened since I moved here almost 4 years ago is somebody having a bit of music on in the evening... Not even loud, or all night. So why do we need lights on all the time? (It means that when I have to get up at night to go to the loo, I don't need a light...)
Of course, maybe the area is so peaceful because of all the lights. Who knows?
It reminds me of a newspaper article my father once showed me. It was from when they first introduced street lighting in German cities; 100 years ago or so? The writer of the article predicted an increase in night time crime and immoral behaviour - because thieves and muggers would now be able to see during the dark hours, too... No idea whether any research was ever done to find out if this proved to be true. I've certainly always felt safer in the dark countryside than in a well-lit city.