Other designs Flashlight.
A headlamp is a flashlight worn on the head.
Sometimes a light is mounted to a handgun or rifle. See also Streamlight and SureFire.
Most flashlights are cylindrical in design, with the lamp assembly attached to one end. However, early designs came in a variety of shapes. Many resembled lanterns of the day, consisting largely of a box with a handle and the lamp attached to the front. Some others were made to have a similar appearance to candles.
Although most flashlights are designed in a manner that allows the user to replace the batteries and the bulb as needed, fully-sealed disposable flashlights do exist, such as the Garrity Life Lite, and various inexpensive keyring lights. In a disposable flashlight, when the batteries are depleted or the bulb fails, the entire product is thrown away or recycled and a new one purchased to replace it.