Is there anyone tell me what is LED flashlights? What flashlights is fit for outdoor survival?

LED is the type of flashlight, on wikipedia it explains pretty well:

light-emitting diode (LED) (pronounced /??l.i??di?/[1], or just /l?d/), is an electronic light source. LEDs are used as indicator lamps in many kinds of electronics and increasingly for lighting. LEDs work by the effect of electroluminescence, discovered by accident in 1907. The LED was introduced as a practical electronic component in 1962.[2] All early devices emitted low-intensity red light, but modern LEDs are available across the visibleultraviolet and infra red wavelengths, with very high brightness.

LEDs are based on the semiconductor diode. When the diode is forward biased (switched on),electrons are able to recombine with holes and energy is released in the form of light. This effect is called electroluminescence and the color of the light is determined by the energy gap of the semiconductor. The LED is usually small in area (less than 1 mm2) with integrated optical components to shape its radiation pattern and assist in reflection.[3]

LEDs present many advantages over traditional light sources including lower energy consumption, longer lifetime, improved robustness, smaller size and faster switching. However, they are relatively expensive and require more precise current and heat management than traditional light sources.

Applications of LEDs are diverse. They are used as low-energy indicators but also for replacements for traditional light sources in general lightingautomotive lighting and traffic signals. The compact size of LEDs has allowed new text and video displays and sensors to be developed, while their high switching rates are useful in communications technology.

As far as what the best flashlight is for survival really its the one that works!  There are some really great new  Rechargeable Flashlights with Night Lights They’re great because when the power goes out the light turns on!  You’re never in the dark, unless the battery runs out, but its great for small emergencies.

4 Comments on "Is there anyone tell me what is LED flashlights? What flashlights is fit for outdoor survival?"

  1. philosofurrier | November 10, 2009 at 11:51 pm |

    LED stands for light emmitting diode. A flashlight that is LED usually has anywhere from 1 to 6 of the diodes backed up with a mirror finish to project the light. The good part about LED is the batteries last a lot longer. The bad is the light is not as bright.

  2. LED flashlights are usually inexpensive and lightweight making them ideal for camping/outdoor survival. LED stands for Light-Emitting Diode.

  3. fishtrembleatmyname | November 11, 2009 at 12:58 am |

    Light Emitting Diode flashlights are ideal for survival flashlights. For one, they’re far more efficient than normal lights, due mostly to the fact that instead of using a hot filament to create light, and thusly wasting most of the energy on heat, they use a small crystal to create light directly from electricity, usually with minimal heat. This also means that they’re much more resistant to shock, movement, and impact, and an LED is usually rated for 50,000 hours, but will last much longer, as they are solid state and rarely will have a reason to burn out. An LED can be very bright, there are 5-watt models that put out a significant amount of light, and are still not hard on batteries.

    So, for a flashlight, figure out what output you need, then find that in an LED flashlight, and you’ll have one that’s more durable, longer lasting, more economical, and will usually produce a better spectrum of light.

  4. LED is short for light- emitting diode. LED flashlight is the flashlight using LED as lamp or bulb.
    Tactical Flashlights. Here, I recommend you to have a tour on http://www.flashlightcool.com. You can find the one that fits you.

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