Throughout the history of mankind, it is not difficult to find the trace of "light". The street lights at night are simple and simple, and the straight lamp poles stand on both sides of the road, making the people returning home feel warm and dedicated to send people the light of returning home.
So, do you understand the development history of road lighting? What lighting used in ancient streets? Next, let us introduce the development history of street lighting through 10 iconic events!
1. In ancient Rome, the rich used vegetable oil lamps to illuminate their entrances. There are special slaves responsible for lighting, extinguishing and watching.
2. In 1417, the Mayor of London ordered all families to hang lanterns outdoors in the winter evening. This is the first public street lighting organized by the government.
3. In 1802, Scottish inventor William Murdoch launched a campaign for more efficient street lighting. His gas lamp illuminates the exterior of the Soho foundry and shows it to the public. Five years later, London had the first street illuminated with gas lamps.
4. In 1816, Baltimore became the first city in the United States to install street lighting. In 1820, Paris followed.
5. In 1878, Paris installed the world's first arc street lamp. Three years later, 4,000 arc lamps were installed, effectively replacing the steam lamps installed on the lamp posts.
6. In 1879, Edison successfully made incandescent bulbs with carbon fiber as the filament, which changed the world and promoted the development of bulbs for street lamps.
7. The low-pressure sodium lamp was invented in Europe in the 1930s. These lamps include a removable housing and a vacuum insulation layer that utilizes low-pressure sodium vapor discharge to emit light.
8. American Nick Holonyak Jr. developed the first practical visible light-emitting diode (LED) in 1962.
9. In 1965, the American company GE introduced high-pressure sodium lamps (HID), which have superior color and efficiency compared with low-pressure sodium lamps. At present, HID lamps are still the most common type of street lamps on earth.
10. LEDs now have a longer lifespan, produce better light, and use less energy than HID lamps. Although LEDs accounted for only a small portion of U.S. street lights a few years ago, the pace of adoption is advancing by leaps and bounds.
In response to the requirements of social energy conservation and environmental protection, renewable green environmental protection solar street lamps were introduced, maintenance-free valve-regulated sealed batteries (colloid batteries) to store electrical energy, ultra-bright LED lamps as light sources, and controlled by intelligent charge and discharge controllers for Replace street lamps for traditional public electric lighting.