How do the flashlights work from the aspects of diode

A flashlight, it is a kind of handheld electronic lighting tools. A flashlight typically have a via a battery-powered light bulbs and focused on the mirror, and a hand-held shell for handheld. How do the flashlights work. Torch design is fairly simple, it is only as late as the end of the 19th century, the invention, because it must be combined with the battery with the invention of the electric light bulb. In the early days because of the storage battery power is insufficient, so it is called the "Flashlight" in the English language, which means a short light. Because now grows to the diode to replace the traditional light bulb, not only saves electricity, and more durable. Here is how do the flashlights work from the aspects of diode. 

   More and more flashlights to use leds to replace the traditional light bulb. Light-emitting diodes (leds) have been invented for decades, in 1999, a company in SAN jose, California, USA, invented the high-energy halogen white light-emitting diodes (leds). Leds can use less electricity but sends out a stronger light source, so it is better than traditional light bulbs. This kind of flashlights have longer battery life, some can reach hundreds of hours. A wrong idea about light emitting diode is to think that they are not hot. While it is true that a low energy light emitting diode emits very low quantity of heat, but high energy light emitting diode can still emit heat. This can very good understanding how do the flashlights work from the function of diode. 

   That how to the flashlight works is introduced, in fact, the LED is very common in life. LED flashlight with multivessel diode, colour temperature is very high. Give a person the feeling is very light, this is characteristic of him. And he is very energy efficient, a v battery can last more than ten hours. Another is magnesium aluminum alloy shell, compact wind rain corrosion, can is very suitable for outdoor use. Actually LED flashlight diode is not the highest in the whole cost. But the shell of magnesium alloy. Is the main component and process. Metal production are better than normal, component is sufficient, in addition process is very exquisite. And a few small factory process very rough. Have LED to control current, or easy to burn out.