search:led torch wikipedia相關網頁資料
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![LED lamp - Wikipedia, the free encyclopedia]()
en.wikipedia.orgThese standards detail performance specifications for LED light sources and prescribe test methods for solid-state lighting products. The Illuminating Engineering Society of North America (IESNA) published a documentary ...瀏覽：394 -
![Flashlight - Wikipedia, the free encyclopedia]()
en.wikipedia.orgA flashlight (North America; torch elsewhere) is a hand-held portable electrically-powered light source. Usually the light source is a small incandescent light bulb or light-emitting diode (LED). A typical flashlight consists of a light bulb mounted in a瀏覽：645
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日期：2024-08-15
A flashlight (North America; torch elsewhere) is a hand-held portable electrically-powered light source. Usually the light source is a small incandescent light bulb ......
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日期：2024-08-17
Solar powered flashlights or solar powered torches are flashlights powered by
solar energy stored in rechargeable batteries. Most of these flashlights use ......
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日期：2024-08-18
A Haitian boy turns the crank on his crank-powered flashlight radio. ... A linear
induction flashlight is charged by shaking it along its long axis, causing a magnet
......
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日期：2024-08-18
§Slight error.[edit]. LEDs do not use 3.0-3.6 volts, the range is far larger due to
different colors being available. In a LED flashlight it will likely range from 1.9 (red
) ......
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日期：2024-08-13
A torch is a hand tool which provides light or heat. In the past, torches have
comprised a fire-resistant rod wrapped at one end with a material that has been ......
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日期：2024-08-16
Originally Maglite flashlights used krypton or xenon incandescent bulbs. Current
models ... 2011: a variety of LED and rechargeable flashlights introduced.These ......
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日期：2024-08-15
23 Jan 2014 ... When this yellow light mixes with the blue light from the LED, the combined light
appears white to the human eye. See LEDs in Wikipedia ......
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日期：2024-08-11
However, some torches use LEDs, which work slightly differently, and are often
more powerful, but give the same effect. In 1896, the first dry cell battery was ......
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