![]() ![]() The invention of the wet cell and miniature incandescent electric lamps made the first battery-powered flashlights possible around 1899. A typical flashlight consists of the light source mounted in a reflector, a transparent cover (sometimes combined with a lens) to protect the light source and reflector, a battery, and a switch, all enclosed in a case. Formerly, the light source typically was a miniature incandescent light bulb but these have been displaced by light-emitting diodes (LEDs) since the mid-2000s. The angle-head flashlight on the left uses an incandescent bulb, while the adjustable angle-head flashlight on the right uses LEDs to give white, red, blue, and infrared lightĪ flashlight, ( US, Canada) or torch ( UK, Australia) is a portable hand-held electric light. ![]()
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