/members-area/personalblogs/b/blog/posts/led-tunnel-light-100w-737118187LED Floodlight 20W economic hot, perhaps in order to break or summary, the lighting is divided into three eras:A filament light bulb era (incandescent lamp)Second, the gas bulb era (fluorescent)Third, the semiconductor light-emitting era (LED)Among ten-USTelligent Community 12