Incandescent bulb for the earliest mature artificial electric light source, it is to use filament electricity heating luminous principle luminous.
Generally speaking, incandescent lamp of luminous efficiency is low, life is short, but the use of more convenient. Incandescent bulb human use incandescent light bulb has a history of 128 years, mention incandescent lamp, we naturally think of the great inventor Thomas Edison, he in order to search for incandescent filament material, tested more than 6000 kinds of materials, and finally use carbon wire test out the first only real incandescent lamp, the use of the 45 hours later filament to fuse, then after Edison and renewed continuously improve, incandescent lamp just had today 3000 hours of life.
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