LED energy-saving lamp is a new generation of lighting source after the compact fluorescent lamp (that is, ordinary energy-saving lamp). LED energy-saving lamp is environmentally friendly and does not contain mercury, can be recycled, small power, high efficiency, long life, that is, on that is bright, resistant to frequent switching, light decline is small, rich in color, adjustable light, rich changes. An LED, short for Light Emitting Diode, is based on an electroluminescent semiconductor material placed on a shelf with a lead and sealed with an epoxy resin around it to protect the inner core, so the LED is resistant to earthquakes. The core part of light-emitting diode is composed of p-type semiconductor and n-type semiconductor wafer, there is a transition layer between p-type semiconductor and n-type semiconductor, called p-N junction.

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