Street lamp refers to the lamp used to illuminate the road. They are usually installed at the side or center of the road to provide enough light for pedestrians and vehicles to pass safely at night or in low visibility. The design and function of street lamps are different, but they all have some common characteristics.

First of all, street lamps are usually equipped with high-altitude columns or brackets. This is to raise the lights to cover a larger area and ensure that light can spread to all parts of the road. Columns or supports are usually made of metal materials to provide sufficient strength and stability.

Secondly, street lamps usually use high brightness light sources. Common light sources are incandescent lamp, fluorescent lamp and LED lamp. These light sources have high brightness and long service life, and can provide enough light to make the road clearly visible. In recent years, LED lamps have become the main choice for street lamps because of their high efficiency, energy saving and dimmable performance.

In addition, street lamps usually have a protective cover or lampshade to protect the light source from the external environment. A protective cover or lampshade can prevent the light bulb from being disturbed by wind, rain, dust, insects, etc. At the same time, the scattering and focusing of light can be controlled to achieve better lighting effect.

In addition, street lamps are usually equipped with light control devices or timers to realize automatic switching. The light control device can automatically adjust the brightness of the light according to the change of ambient light, so as to save energy. The timer can automatically turn on and off the lights according to the preset schedule to ensure that enough light is provided during the time period when lighting is needed.

Finally, street lamps can be equipped with other functions, such as surveillance cameras and traffic lights. Surveillance cameras can be used to monitor road traffic and safety, and traffic lights can be used to indicate the direction of vehicles and pedestrians. The addition of these functions can improve the universality and practicability of street lamps.

In a word, street lamp is a kind of lamp used to illuminate the road, which has the characteristics of high column or bracket, high brightness light source, protective cover or lampshade, light control device or timer. Their design and function can be adjusted and improved according to actual needs to provide better lighting effect and safety.