In 1879, Edison in the United States successfully extended the life of the incandescent bulb to more than 40 hours.
In 1910, Curie hall in the United States made tungsten filament, invented tungsten bulb and incandescent lamp.
In 1913, Langmuir of the United States filled the glass shell with gas to prevent the filament from evaporating, and invented the gas filled tungsten bulb.
In 1925, Japan's indestructible orange invented the inner wall frosted bulb.
In 1932, Japan's Miura Shunyi invented the double helix tungsten filament bulb
Since then, human beings have never stopped pursuing light.
In the 1990s, it was widely used in urban slow lane, narrow lane, residential area, tourist attraction, park, square, private garden, courtyard corridor and other public places for road lighting on one side or two volumes. It can also change people's mood, improve people's mood, change people's concept, and create a bright and dark palette like night 。 During the day, the courtyard lamp can decorate the city landscape; at night, the courtyard lamp can not only provide necessary lighting and life convenience, increase the residents' sense of security, but also highlight the highlights of the city, deduce the bright style, so that it has developed into a mature industrial chain.