Got kids? If so, then its a given that you've got night lights in your home. They are handy little appliances that scare away monsters in the middle of the night, help light a path between the bedroom and the bathroom during emergencies, and keep parents from snapping a tendon while navigating the dimly lit minefield of toys that is the hallway.
Most of the time, night lights dutifully execute their given task with little more than the flick of a switch. Some are even designed to respond to motion or low-light situations. Thus, they require little attention and inspire little thought. But its time to examine just how innocuous our little nighttime helpers really are.