Do you know the orgin and development of
LED Lamp
* 60 years of the 20th century, the scientist and technology workers using the principle of semiconductor PN junction light, developed into LED light-emitting diodes. At that time the development of the LED, the material is GaASP whose light color is red.
* The first application of LED light source made by semiconductor P-N junction light principle came out in the 20th century, the early 60s. The material used was GaAsP.
* In the mid-1970s, the elements In and N were introduced to give green, yellow and orange light
* To the early 80s, with the apperance of GaAlAs LED light source, making the red LED light visual effects to 10 lumens / watt
* 90 early, the red, yellow GaAlInP and green, blue GaInN two new materials developed successfully, so that LED light and visual effects have been greatly improved
* In 2000, the luminous efficacy of former LED lamp in the red, orange (λp = 615nm) reached 100 lumens/watt, while the latter LED in the green area (λp = 530nm) optical performance can reach 50 Lumens/watt.
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LED street light,
LED high bay light.Welcome to contact us.
