During an evening walk around the neighborhood, we could hear some kids a few steps ahead of us counting the houses that had their porch light on. "How come some houses do and some don't?" one kid asked, and the other kid replied, "Because the ones that don't are where witches and trolls live!" Well, while that may not be totally accurate, it got us thinking about the importance of porch lights. Do you leave your porch light on at night?