A LED flashlight produces light through light emitting diodes (LEDs) rather than an incandescent bulb, making them cooler, more energy efficient and tougher. Incandescent light used in traditional flashlights utilizes a filament wire encased in a glass vacuum tube or bulb.

What is a LED flashlight used for?

Some of the more common uses for a red light emitting diode (LED) flashlight are stargazing, hunting with a night vision scope, or military operations. This is because the red light that is emitted from this flashlight is more visible at nighttime than other colors of flashlight bulbs.

What kind of LEDs are in flashlights?

LEDs in Flashlights As the LED inside gave off light, the rays were shaped by the round head to go straight ahead. Many keychain flashlights use a simple LED like that. These are usually named as 3 mm or 5 mm LEDs. The Fenix E01 uses a 5mm Nichia LED.