Street Sensor Light: How Does It Work to Save The Costs

Street Sensor Light How Does It Work to Save The Costs

Street lights have become imperative for lighting up the streets for citizens and drivers at night. But for some with unreasonable settings, lighting up streets that barely anyone passes by for a whole night has become a common problem. How to avoid energy waste is the prime point to consider for saving costs. Thus, various sensoring systems have been invented and applied in the smart poles in modern cities. Want to know what the street sensor light can do and whether you should also install one? You can read the following passage about the street sensor light for answers!

Why do we need the street sensor light?

Suitable lighting setting

The lighting quality needs to be improved, as sometimes the light that has been set manually is not bright enough. Only a few people think that local street lights are bright enough. The street lights in some places are even very dim. When these dim street lights are on the downhill or in areas with a large traffic flow, there are great security risks.

dim street lighting

Saving energy

In some suburbs and remote sections, after 1 o’clock in the morning, the flow of people and traffic is often very small. But even if no one or car passes by, the street lights are still lit for a long time. The really effective lighting time of many sections only accounts for 20%-30% of the lighting time. A big city often has hundreds of such streets, which means that a city wastes hundreds of millions of degrees of electricity on street lights every year.


Long-term lighting will consume the service life of the street lamp. If the street light is only lit when it is needed, it can effectively extend the service life of the street light and save on the cost of replacing it.

High reliability

Taking the optical sensor as an example, the photoresistor can work automatically to control the light when there is equipment failure. Thus, the reliability of its control is greatly improved. At the same time, the light induction control technology is automatic and doesn’t need manual intervention. Therefore, there will be no adjustment deviation due to manual error, which significantly reduces the workload of lamp maintenance.

Different types of the street sensor light

Light sensor

Light control regulation technology enables smart street lights to recognize the surrounding natural light. When it gets dark, the lights light up, and when there is sufficient light, they turn off automatically. This is usually achieved with the photosensitive original. When receiving a certain intensity of light, it can change the resistance value and excitation carriers in order to switch on or off the circuit. In addition to converting the optical signal into a telecommunications number, the phototransistor can also amplify the electrical signal, so it is relatively more sensitive. With the help of excellent control systems such as PID to reduce errors, the response of smart street lights to light will be more accurate.

In addition, smart street lights also derive some practical functions according to people’s needs, such as sensing visibility and adjusting the color of the light. When it is foggy or rainy, it changes from ordinary white light to yellow light that can penetrate the fog.

IR sensor

When someone passes the street lamp with the IR pyroelectric induction module, the controller receives the induction signal to adjust the brightness of the light to a strong, bright mode. When the person leaves the sensing range, the controller can delay for a certain period of time and then keep the brightness at a relatively low level. Passive infrared induction has low power consumption and is easy to implement. But the infrared probe needs to be installed in obvious positions and regularly cleaned. Many factors, such as temperature, air flow, light, etc., can affect the infrared probe. Sometimes passive infrared penetration can be poor.

IR sensor

Radar sensor

Many solar street lights use radar sensors for intelligent control. The Doppler effect is used by the street lights to produce electromagnetic waves through a flat antenna. It can successfully block high-harmonic interference and other commotion. High sensitivity, dependability, safety, convenience, and intelligent energy savings are the advantages of radar sensing. The waveform reflects back when it comes into contact with moving objects in an electromagnetic wave environment. The succeeding circuit operates by detecting the trigger signal when the planar antenna gets the feedback waveform.

RFID sensor

RFID uses radio frequency to detect the dynamics of the vehicle and collect information. It requires installing on-board RFID tags on the car, RFID intelligent terminals on the side of the road, and a monitoring center server in the central computer room. RFID-enabled intelligent terminals can control the opening and closing of street lights to achieve the purpose of saving energy and manpower. Under special circumstances, the monitoring center server can be forced to light up. In addition, the system also has the functions of centralized and automatic control, real-time data acquisition, key data protection, vehicle tracking, and so on.

Applications of the street sensor light

Real-time fault notification

The current road lighting fault repair is often limited by human factors, which makes it easy to delay repair, causing a lot of inconvenience to the public. Street sensor lights, plus the use of power line communication technology (PLC), can immediately detect and carry out information prompts. In this way, it can effectively shorten the repair time and reduce the cost of traditional labor-intensive maintenance.

Illumination elastic adjustment

The intelligent LED system can transmit information, analyze it, and automatically control the lumens of the light through the ZigBee wireless sensing network and PLC technology. When the streets are not busy, the system automatically adjusts the LED lighting to a low level. On the contrary, if there are intensive human and vehicle activities, it uses high-lumen LED lighting to improve the visibility of the driver and ensure driving safety. According to the government of Toulouse in southwest France, if the induction street lamp is successful and promoted to the whole city, it will save at least half of the street lamp’s power consumption.

Color temperature elastic adjustment

Cars that usually drive at night often use fog lights to improve visibility in the fog. Similarly, smart street lights can also automatically detect fog, light conditions, and emergency situations through sensors and flexibly adjust the color of highway street lights.


With these different types of sensors, the street sensor light can adjust the brightness, color temperature, and lighting period of the light. What’s more, the information about the vehicles and the road condition can be uploaded to the internet for further analysis. The sensing function is the key to a smart lighting system. Except for the sensors, LED lights are also important for the perfect performance of the LED street lights. For LED lights of the highest quality, you can contact Mokolight, one of the most successful Chinese LED manufacturers. For over 17 years, Mokolight has been producing LED lights that have met standards like UL and RoHS and provide the best price to customers. Contact us now for the highest-quality LED lights for your street lights!

Written by ——
Scott Hughes
Scott Hughes
Double Bachelor's degrees in Architecture and Electrical Engineering, 5+ years of experience with LED lighting, intelligent moving lights, and conventional fixtures
Scott Hughes
Scott Hughes
Double Bachelor's degrees in Architecture and Electrical Engineering, 5+ years of experience with LED lighting, intelligent moving lights, and conventional fixtures
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