Causes And Solutions Of LED Street Light Flicker

With the rapid development of LED technology,LED street light use less power, they are brighter, and have a longer lifespan compared with normal street light,which have become the first choice in road lighting.While when walking on the road at night, we sometimes find the street lamps flicker,which causes bad lighting effect.Flicker is one of the common failures and quality problems of LED street light.Many people have a question:Why do LED street light flicker?This lighting blog post told the causes and solutions of LED lamp flicker.

Generally, human eyes can perceive light brightness at a frequency of 70Hz. If it is lower than 70Hz, human eyes will feel flicker. Street light flicker will not only stimulate eyes, but also affect the lighting effect.If the causes is line fault, it even can lead to dangerous accidents, so it should be repaired in time.

Causes of LED street lights flicker mainly are the 3 followings:

1. Problems of drive power supply

The driving power of LED street lights generally adopts constant current power supply. The basic working mode of constant current power supply is to constantly adjust the output voltage to ensure constant current when the internal resistance of LED lamp beads changes.But this adjustment has a certain limitation, constant current power supply has an output voltage range, once the limit is breached, the power supply will enter the protection state, its expression is the lamp began to flicker.

2. Problems of LED lamp bead

The mismatch of LED lamp bead and LED drive power will also cause flashing phenomenon.Normally, a single 1W lamp bead bears the current of 80-300mA and the voltage of 3.0-3.4V. If the power of the lamp bead chip is insufficient, it will cause the phenomenon of light source frequent flashing.If the current is too high so the the lamp bead can not withstand, it will cause one lamp light up,another lamp goes off.

3. Problem of Waterproof

The third cause of LED street light flicker is that the lamp waterproof did not do well.If either the lamp bead or the power supply is damaged, it will cause flicker and need to be repaired in time.

Solutions for faults of LED street lights

Maintenance personnel should first check out that what causes the problem of LED street lights flicker,the drive power supply or LED lamp bead?The fault location can be identified by replacing the drive power supply and lamp bead separately. If both of them are faulty, they need to be replaced together.Sometimes there will be a fault that the street lamp still flicker after turning off. It is necessary to consider whether it is a problem of the line. It may be that the zero line of the switch control has a problem, which needs to be dealt with in time to avoid safety accidents.If no problem is found after the circuit inspection, it is likely that the LED street light itself produces self-induced current, and the problem can be solved by connecting the coil with the lamp in series with the relay.

Summary:

LED street light is essential lighting equipment in road lighting at night. Some buyers pay too much attention to the price quoted by manufacturer, but ignore the quality problems of product.All kinds of quality problems of LED road light will cause lability of lighting effect,and cause a lot of troublesome for later maintenance and replacement work.This not only brings the potential safety hazard to pedestrians and drivers but also increases the bill of public expenditure burden for urban construction.Therefore,choosing reliable and professional led street light manufacturer to buy.Even if there is inevitable lighting failures such as lamp flicker, also can get good after-sales service and solution from manufacturer.