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Author ：Green earth– LED Strip Lights manufacturers
In the 1960s, science and technology workers knew the principle of semiconductor PN junction, and developed an LED light-emitting diode. The material used in the initial LED is gallium arsenide, and its luminous color is red. After nearly 30 years of development, our LED lights have been able to make red, orange, yellow, green, blue and other colors. However, white LED lighting is only developed after 2000. The application of the semiconductor PN knife LED light source is earlier in the 1960s, the material is arsenide, red light (λP = 650 nm), the drive current is 20 mA, only the mainstream of the light flux, the luminous efficiency is approximately 0.1 lumens / watts.
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