The characteristics of LED illumination Fifty years ago,the huminality had already known the basic knowledge of semiconductor material can produce light，The first commercial diode produced in 1960.LED is short for light emitting diode(LED),its basic structure is an electroluminescent semiconductor material，placed on the a stand with down-lead，and then sealed with epoxy resin around in order to protect internal batteries，so the aseismatic capability of LED is good。 The advantages of LED illumination
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