LED development and application
Firstly, LED was only applied on indicator light, such as computer, speaker and video camera, with the rapid technology progress, LED was applied on commercial and home light gradually. Especially led panel light, it was widely applied on school, train station, office, hotel and bank.
LED plays a very important role nowadays, it is great achievements after
incandescent lamp developed by Edison. The earliest developed led can only emit red light which was applied on indicator. Nowadays, LED can emit red, yellow, green, blue, white etc. In most of big cities, you can see led lights everywhere, our life and working environment are changed by LED/