It’s a good thing to have motion sensor lights outside of your house. They are helpful when you get home so you don’t have to struggle with you keys in the dark. They also are good at scaring away any potential burglars. Sometimes, however, a breeze moving a tree branch can set them off and give you a false sense of activity in your front or back yard. However, what are you to think when there is no breeze and no visible sign of anything that could have set them off? Do you go out to investigate or just wait and hope it was nothing?