How Many Flashlights do You Know

Before LED flashlight, there were several types of flashlight in the history. But do you know them? This article will share you some knowledge about the flashlight history.

The History of LED Flashlight

In ancient times, human have to use fire at night when they are outside. For example, they have to carry a lantern with candle inside, or oil lamp with them when to go out at night. It is not difficult to image how inconvenient it was. Till flashlights came out, human start to discard fire and lantern.

After Edison invented the light bulb 100 years ago, a man named Hubert Americans invented the first torch in the world. Flashlight (English name: flashlight or torch), referred to the torch, is a handheld electronic lighting tools.

Before LED flashlight, three important types of flashlights make their appearance in human's history: halogen flashlight, ordinary flashlight and xenon lamp flashlight (include divided tungsten and xenon HID) and the like.

1, There were a lot of halogen flashlight on the market before LED become popular, now, this type of flashlight is few.

2, Flashlight with incandescent light bulbs and alkaline batteries. This kind of flashlight is shelled with cladding metal and called as the first generation flashlight. They commonly used incandescent bulbs, low luminous efficiency, life is short, easily to burn. Large alkaline batteries with large capacity but life is not long.

3, Xenon flashlight uses incandescent light bulb, but thanks to the xenon, brightness increased a lot, light yellow color. This flashlight is characterized by high brightness, short life (maximum of 40 hours ).

4, LED Flashlight. LED is the "light emitting diode", a lighting tool uses light emitting diode as light source, it has power-saving, durability, brightness and other advantages, is the world's most popular and most promising flashlight.

To judge whether a LED is good or bad, the key point is the light source. In flashlights, the LED bulbs determines the quality and life of the flashlight. So, to choose flashlight, you'd better ask where the LED is from. Now, LED bulbs from USA is the best in the market, therefore, most Tank007 flashlights applies LED bulbs from USA, in order to ensure the flashlights' quality.

LED advantages:

Compared with incandescent bulbs and neon lights, LED is characterized by: operating voltage is low (some only need a few volts); operating current is very small (some can shine with only a few tenths of milliamps); shock and vibration resistance is good, high reliability, long life; by adjusting the strength of the current through the modulation can easily adjust the intensity of light emission. Thanks to these characteristics, LED is used as light source in some optical control device, and is used as signal display in many electronic devices.