flashlight
portable, hand-held electric light
Solar powered flashlight
flashlights powered by solar energy
mechanically powered flashlight
electric light that is mechanically driven by an electric generator using muscle power
penlight
flashlight with similar form-factor as a pen, to enable easy storage in clothing pockets
Surefire lights
Flashlight produced by Surefire, handheld, weapon-mounted, head/helmet mounted
tactical light
flashlight used in conjunction with a firearm