The millennium development history of street lamps: 10 landmark events Back to the new list
According to American media, there are 55 million street lights on American roads today to provide lighting for 250 million cars. The emergence of lighting has brought great changes to human beings.
So, do you know the history of the development of road lighting? What does the ancient street use to illuminate? Below, let us introduce the history of street lighting through 10 landmark events.
1. in ancient Rome, the rich used vegetable oil lamps to illuminate their doorway. There are special slaves, and watch the lights off for lighting.
In 2.1417 years, the mayor of London ordered all families to hang lanterns outdoors in the winter evenings. This is the first public street lighting by the government.
In the 3.1802 year, the Scotland inventor William Murdoch (William Murdoch) launched a campaign to illuminate more efficient streets. His gas light illuminated the outside of the Suhe foundry and showed it to the public. Five years later, there was the first street in London that was illuminated with gas lights.
4.1816 years, Baltimore became the first city in the United States with natural gas street lighting installation. In 1820, Paris followed.
In 5.1878 years, the world's first arc lamp was installed in Paris. Three years later, the installation of 4000 lamp arc lamp, effectively replace the installed in the lamppost on the lamp.
6.1879 years, Edison successfully made the incandescent bulb with carbon fiber as a filament, changed the world and pushed the bulb for the development of street lamps.
The 7. low voltage sodium lamp was invented in Europe in 1930s. These lamps include a removable shell and a vacuum insulating layer, which use low pressure sodium vapor to glow.
8. American Nick Holonyak Jr. developed the first practical visible light emitting diode (LED) in 1962.
9.1965 years, the United States GE company launched a high pressure sodium lamp (HID), compared with the low voltage sodium lamp, with outstanding color and efficiency. At present, the HID lamp is still the most common type of street light on the earth.
10. now the LED lives longer, produces better light, and uses less energy than the HID lamp. Although LED was only a small part of the American street light a few years ago, the pace of adoption was leaps and bounds.
Since the ancient times of Rome, we have gone a long way. And because of the rapid rise of LED, the HID street lamp may soon disappear as soon as the previous lights are.