1, LED development:

Lighting development course memorabilia from collectors around the world--1879 Thomas Edison invented incandescent-1959 halogen lamp, high-pressure sodium lamp was 1961-1962 metal halide lamp appears-1969 first lamp that LED lights (red)-1976 green LED lights-1983-1993 the blue LED appeared fluorescent lamp-1999 white LED lights-the start of the 21 st century now, as the earth's resources lacking, people already through the nature and science, wonderful to create LED energy conservation and environmental protection lamps and lanterns, is our green revolution in lighting technology, this will also be LED the incandescent lamp and a huge since lighting revolution. It also LED to replace incandescent lamp, fluorescent lamp sign. For example: LED lamps sun situation, main or white LED to high single lamp mainly. At present, the LED lighting manufacturers warranty for three years, each big particles