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Flashlights

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Flashlights

FlashlightsFlashlights, or electric torches as they are sometimes called consist of an easy to carry housing that contains a light bulb, a reflector and a power supply which is usually electric batteries although some flashlights have hand powered cranks to generate electricity or solar collectors that store the suns energy until darkness. Most are designed to be hand held, but headlamps for camping, miners and emergency rescue personnel are common as well.

The first flashlights were actually used by police in New York City first. Although the first electric torches did not sustain power for long, they were very popular and useful to officers. The quick flash of light that quickly faded was a characteristic of the first portable lights, which is how the term “flashlight” was coined. Improvements in battery efficiency and light bulb life have allowed them to become standard items for homes, cars, campsites and emergency scenes.

Incandescent flashlights are the most common, and consist of a bulb that contains a wire of tungsten that gives off heat and light when an electric current is run through it. The bulb is also filled with gas, usually argon or halogen but higher quality bulbs use xenon. Maglites are a popular incandescent flashlight and allow owners to make modifications to increase power output and light. Light emitting diodes, or LED’s are becoming more popular because of their efficiency.


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