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Why LED is the fourth generation light source (green light)?

Categories: FAQStars: 3Stars Visit: - Release time: 2014-04-22 16:01:00
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According to the classification of the luminescence mechanism of electric light source: the first generation light source: resistance such as incandescent light. The second generation light source: arc and gas emission such as sodium lamp. The third generation light source: the fluorescence powder like fluorescent lamp. The fourth generation light source: solid state chip light emitting such as LED.

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