flashlight

A portable, usually handheld, illumination device. Typically, a flashlight consists of a stem, comprised of a hard casing that doubles as a handle and as the housing for batteries that power the flashlight, and a head, a bulbous protuberance topped by a durable lense. It is within the head that the lightbulb is fixed. Depending upon the size of the bulb and the batteries powering it, the beam produced by the flashlight is powerful, diffuse, focused, or intermittent.