How long do street lamps usually stay on?

Generally, the turn-on time of street lamps will vary according to different regions and seasons. Here are some common situations:

1. Urban roads: On urban roads, street lamps are generally turned on after sunset and turned off before dawn. The specific opening and closing time will be adjusted according to the latitude and longitude, season and weather conditions in the area. In winter, due to the short sunshine time, street lamps may be turned on in advance, and in summer, due to the long sunshine time, street lamps may be turned off later.

2. Expressway: Street lamps on expressways are generally turned on after dark and turned off before dawn. This can provide enough lighting to ensure the safety of drivers. On some busy highways, street lamps may be turned on all day.

3. Rural roads: Street lamps on rural roads are generally turned on after dark and turned off before dawn. In rural areas, due to the small traffic flow, street lamps may be turned on later and turned off earlier.

4. Residential areas: Street lamps in residential areas are generally turned on after dark and turned off before dawn. This can provide enough lighting to ensure the safety of residents. In some residential areas, street lamps may be set to automatic induction type, which will automatically switch on and off according to the brightness of the surrounding environment.

It should be noted that the above is only the opening time of street lamps in general, and the specific opening and closing time may be different due to regional, seasonal, weather and other factors. In addition, in some special circumstances, such as holidays and special activities, the opening time of street lamps may also be adjusted.