Why does the LED light flash when the light is off? Possible causes and solutions to the problem

Today, energy-saving lamps are very popular due to their long service life and low electricity consumption. However, they are already falling into the background, as more and more consumers prefer LED lighting elements.

Of course, every person wants the device purchased for a lot of money to work smoothly and does not bring any trouble. However, sometimes it happens that the light blinks when the light is off. What is the reason for this? Can I leave the lighting device without attention? With all these questions, let's try to understand the article.

Why the LED light is blinking: the most common cause

Such a malfunction usually occurs in many energy-saving and most LED lamps. It's all about their arrangement. The problem is that devices of this type operate on a voltage of 12 V. As is known, there is no such network in the apartments. In order to allow the products to operate from the 220 V network, voltage converters are built in the lamp base. They consist of a capacitor that accumulates a charge, which causes "ignition", and the lamp starts to shine after pressing the switch. Thus, the lighting device does not feed directly, but only with the help of a converter.

To understand why the LED lamp flashes when the light is off, it is necessary to consider the operating principle of the switch itself.

The backlight turns on at the same time as pressing a key, which consists of an LED and a low power resistor. When the light is off, the button "resets" the power circuit of the chandelier, however, a small current passes through such a path. Its magnitude is not enough to fully charge the starting capacitor located in the light bulb converter. After a certain time, a certain charge accumulates, and the lamp "starts". But, the amount of energy is too small, so the lighting device flashes and instantly goes out, and everything repeats again. This most often explains why the LED lamp flashes when the light is off. However, there are many more reasons for this failure. They are quite common, so you should not exclude them.

Common causes

Continue to consider the malfunction of lighting equipment. To explain why the LED lamp flashes when the light is off, it is worthwhile to pay attention to the possible causes of the malfunction. Probably the whole point is:

• Incorrect installation and connection of the lighting system.
• Production marriage. If you buy a very cheap Chinese light bulb, then do not expect much from it.
• LED backlight switch. The button is often built in an additional "flashlight", which allows you to quickly find the light source in the dark. The problem is that this LED is powered from one network with the chandelier itself, because of which a multiple repeated closure can occur.
• The end of the service life of the LED lamp.

Perhaps this explains why the LED light is blinking. It is also worth considering less likely causes of the failure. Such situations are the least common.

Possible reasons

The least likely answer to the question "Why does the LED lamp flash off?" Becomes one of the following faults:

• Damaged some detail in the device chip.
• Interruptions in the network occurred too often. Manufacturers are not responsible for excessive voltage surges. This happens very rarely, but if the apartment permanently breaks down all the lighting equipment, then the problem can be in this.
• There was a breakdown of the dimmer. This device is used to smoothly change the brightness of the lighting in the room.

Some people are not annoyed at all, if the LED lamp blinks when the light is off, others may not pay attention to it at all. However, do not underestimate these lighting elements.

Why you can not ignore the blinking lamp

If the device is used to illuminate a technical room, this can not cause serious harm. In this case, you can leave it as it is. However, if it is a living room, then the blinking light can cause serious trouble.

The fact is that flicker is very harmful to vision. If the lamp blinks all the time in the room, then the eyes will get tired too quickly, and the thinking activity will eventually become inhibited. This is especially harmful for young children.

Also, repeated outbreaks can trigger an epileptic attack in a person suffering from this serious ailment. Blinking of lamps negatively affects animals, especially cats. Four-footed people start to behave more restlessly and may begin to show aggression.

Therefore, if the LED lamp blinks after shutting down, the problem needs to be corrected. And do it as quickly as possible. Also it is necessary to watch that the coefficient of blinking of the chandelier does not exceed 20%. To do this, it is enough to buy a luxmeter.

Now we turn to the recommendations for repair of out-of-order lighting.

The LED light is flashing: what should I do?

The first way is to change the parameters of the working circuit of the backlight supply. There are two options for how it can be arranged:

• With the use of a board on which a compact resistor and LED are located.
• With a parallel connection of a standard resistor and LED-element.

In the first case it will take a very long time to tinker. It will be easier just to remove the board. In the second case, everything is much simpler. You can try changing the resistor, setting instead a more powerful one. This will reduce the current that comes from the capacitor, so it just will not accumulate.

When replacing a resistor, it is worth considering its power and the type of lighting device. For the LED elements, units with a rating of 470 or 680 kOhm are suitable.

Method 2

In this case, it is necessary to connect the chandelier and the low resistance circuit in parallel . Due to this, the currents passing through the backlight will not accumulate in the capacitor. Instead, they will walk along the chain, and the lamp will stop flickering.

To do this, you need to purchase a resistor with a power of no more than 2 W and a nominal resistance of 50 kOhm. To make it easier to connect, you need to solder to its outputs conductors. After this, the resistor must be isolated. To do this, first, heat-shrink every soldering point, then pull the heat shrink tubing over the resistor (the more, the better) and close the resistance casing.

The prepared chain is connected in parallel to the lamp. For this purpose it is recommended to use a junction box.

Method 3

Some people use a capacitor instead of a resistor. In this case, you need to purchase a device whose power is 400 V. The connection is made in the same way - in parallel. It is better to use a junction box.

This is a simpler and more effective solution that will help to regulate the operation of blinking lamps.

If problems with insulation

If a current leak occurs, then this is a more serious problem. In this case, it is necessary to find the oxidized conductor, the contact pad and clean it. Also, you have to solder connections.

In some situations, the current can "go away" because of poor insulation, so you will have to spend quite a lot of time searching for leaks. When there is an automatic machine on the line, it is also constantly "knocked out". If this happens, then the problem is most likely the result of poor wiring. To determine its "breakdown" the easiest way is to use a multimeter.

Knowing why the LED lamp flashes when the light is off, you can solve the problem yourself. However, those who are "on" you with electricity, is not recommended to experiment. It is better to call the master. An experienced specialist with the naked eye will determine the cause of the failure.