In the urban lighting system, LED street lights have become the main force of street lighting with the advantages of high efficiency, energy saving and long life. However, some users have found that LED street lights have flickering phenomenon. Behind this seemingly common problem lie many scientific principles and safety hazards. Next, we will discuss why LED street lights flicker.
solar street light
The flickering phenomenon of LED solar street lights can be categorized into two types, which can be visible and invisible to the naked eye, and they have different degrees of impact on human health and experience.
In this type of flickering, the light output of LED street lights changes rapidly, with the light frequency fluctuating in the range of 3Hz to 70Hz. The human eye is able to visualize the alternation of light and dark, and this rapid change is a significant health hazard, particularly associated with photosensitive seizures. Frequent flickering can also cause dry eyes, blurred vision and other eye problems.
Although difficult to detect with the naked eye, this type of flickering is also risky. It can cause discomfort such as dizziness, headaches, migraines, and general malaise such as general weakness and depression. Research into the invisible flicker effect of LED lights is still ongoing.
Flickering lights can put an extra burden on the eyes, leading to eyestrain, headaches and other discomfort. The eye is like a precision instrument, when faced with flickering lights, it needs to be constantly adjusted to adapt to changes in light and darkness, in which the ciliary muscle bears the brunt of the constant tension in the contraction of the state, like a rubber band that has been taut, easy to fatigue after the loss of elasticity and damage. Prolonged exposure to this environment will not only aggravate eye fatigue, but also may induce severe migraine, dizziness and other symptoms, for epileptic patients, may even trigger seizures, greatly reducing work efficiency. Prolonged exposure to such conditions also reduces the self-repairing ability of the eyes, increasing the risk of myopia, dry eye and other eye diseases.
Visible flickering solar LED street lights can be a major distraction in different scenarios. In factories, flashing lights can cause frequent interruptions to workers’ vision, making it difficult for them to focus on precise operations or complex production processes, leading to an increase in the rate of operational errors, which not only affects work efficiency, but may also lower overall productivity. On the road, flickering light will be confused with traffic signals, road signs and other normal light, interfering with drivers to observe road conditions, making it difficult for them to make accurate judgments in a timely manner, greatly increasing the risk of traffic accidents. On the sports field, flickering LED street lights can make athletes feel visually uncomfortable and unable to relax and devote themselves to the game, negatively affecting the accuracy of their movements and athleticism, and thus affecting their competitive level.
solar street light
Flicker, invisible to the naked eye, is invisible in photography. When the camera is set to a high frame rate or a fast shutter speed, a highly sensitive lens can easily capture these subtle flickers. Irregular fluctuations in brightness or flicker streaks appear in the captured image or video, and these imperfections are especially noticeable when shooting dynamic scenes or close-ups. This not only seriously reduces the quality of the image, but also leads to a significant increase in post-processing difficulties, making it difficult to carry out high-quality photography, and greatly reducing the effectiveness of photographic creations.
LED driver is the core component to ensure the normal operation of LED, which bears a double important function. On the one hand, it is the management of charge system, can reasonably regulate the current and voltage, to ensure that the LED stable light; On the other hand, it is like a protective shield, for the LED to provide over-voltage, over-current and other protection, to avoid electrical damage.
LED driver is mainly divided into constant voltage driver and constant current driver two types. The main function of constant voltage driver is to provide stable and continuous DC voltage for LEDs to maintain their working efficiency. Constant voltage drivers are often used when LEDs are connected in parallel to a driver, and are directly adapted to this circuit configuration. In addition, constant voltage drivers ensure that each LED connected in parallel is subjected to a constant voltage load, allowing them to emit light steadily.
Constant-current drivers, on the other hand, have the primary function of precisely controlling the raw current into the LEDs. Because in the LED diode P-N junction in the normal operation of the process, a stable current input is an essential condition, constant-current driver is to maintain a stable current to ensure that the LED normal light.
solar led street light
When the LED driver fails, it is very easy to cause LED street light flickering problem. And, as the driver handles more and more current, it will be more susceptible to heat. Excessive heat will accelerate the aging and damage of the internal components of the driver, further increasing the probability of failure, and ultimately leading to flickering LED street lights.
Loose wiring is one of the common causes of flickering solar LED street lights. In the installation process, if the connection point is not handled properly, such as wiring without tightening the screws, the line interface does not do anti-oxidation treatment, with the passage of time, environmental changes, there may be a loose wiring situation. When you find multiple street lights flashing at the same time, the probability is that the main line connection point problem, you should check the line panel or connection point in time to see whether there is loose, false connection, if so, you need to carry out the fastening process, and if necessary, to replace the aging or damaged connections, to avoid a greater failure caused by poor contact.
Dimmer by quickly adjusting the power of the light to achieve the dimming effect, its working mechanism will make the light on and off many times within a second. However, this way of working is not compatible with LED lights. If an LED street light is connected to a circuit that is not compatible with a dimmer, it will flicker.
Low-quality LED bulbs are often equipped with low-quality drivers, which are a significant cause of flicker in street lights. These low-quality drivers have inherent deficiencies in current regulation and voltage stabilization, and are unable to provide a stable power supply to the LED lights, resulting in flickering lights. Although the purchase of low-cost LED products in the initial low cost, but because of its poor quality, frequent failure, high maintenance costs and short service life. In contrast, high-quality LED products, although more expensive, but the use of high-quality materials and advanced technology, to ensure long-term stability, reduce the frequency of maintenance, more cost-effective in the long run, but also for the city lighting to provide a continuous and reliable protection.
solar street light
Selection of high-quality LED driver is the key to solving the flickering problem. High-quality driver using advanced electronic components and sophisticated circuit design, can effectively eliminate sine wave peaks, to avoid violent fluctuations in current. Among them, constant-current driver is especially good at eliminating current peaks, through the built-in precision regulation chip, real-time monitoring and stabilization of current output, thus avoiding the flicker phenomenon caused by current instability. In the purchase of LED street lights, should pay attention to the quality and performance of the driver, to see whether the driver has overload protection, short-circuit protection and other functions, to ensure that it has a good voltage regulator and current stabilizer, to eliminate the flicker problem from the source.
When multiple electrical appliances share the same power supply, it may lead to voltage fluctuations, which in turn may trigger flickering of LED street lights. Especially during the peak period of electricity consumption, the frequent startup and shutdown of high-power electrical appliances will cause the voltage in the circuit to fluctuate like a tidal wave. Therefore, it is necessary to use professional voltage testing equipment to check the circuit voltage and current on a regular basis, and according to the total power of LED lights, scientifically calculate and ensure that the power supply can meet the load demand of all LED lights. Through rational planning of the circuit and distribution of power, such as setting up independent circuits for LED street lights, the problem of unstable voltage can be effectively avoided to ensure the stable operation of street lights.
After checking the voltage and driver, if the street light still has flickering problem, it is necessary to check each LED lamp one by one. With the help of professional LED testing tools, you can test the luminous efficiency and current through each LED bead. If faulty LEDs are found and still within the warranty period, you can contact the manufacturer for replacement or repair and solve the problem with technical support from professionals. If the warranty period is exceeded, it is recommended to purchase high-quality brands of LED lamps for replacement, and choose products with strict quality testing standards to ensure the lighting effect and stability, and to avoid the impact of a single faulty component on the entire street light system.
LED street light flicker is by no means a trivial problem, from health hazards to the use of trouble, to the complex technical causes behind, each link is worth our attention. Whether it is for the city lighting system managers, or for the pursuit of quality users, mastering the principles of LED street light flicker and coping strategies, are necessary to ensure efficient lighting, maintenance of public safety homework. In the future, with the continuous progress of technology, we look forward to more stable and smarter LED street light products. But before that, choosing high-quality products, standardized installation and maintenance, and timely investigation to solve the problem is to make the city night is always bright, safe and reliable way.
