*************Street lights have photo sensors on them, so if you hit the photo sensor with a spot light they will turn themselves off.
M*W: I've read everyone's reply, but your's makes sense to me. The street lights go off everytime I drive under them, at least the one in front of my house does. I always thought it was me or my car that was giving off some kind of interference. Why would the lights have a sensor so as to turn off the lights. Isn't that counter-productive?