[Red Badger]

Dictionary
flash·light

noun
noun: flashlight; plural noun: flashlights

1.
North American
a battery-operated portable light.
2.
a flashing light used for signals and in lighthouses.
3.
a light giving an intense flash, used for photographing at night or indoors.

[eastforker]

Not to mention flash powder was used in flash pans before the flash bulb.