Why is the LED lamp flashing?

LED lamps gradually replace other types of lighting equipment. This is due to their low power consumption, as well as a long service life. However, some buyers have faced the problem of flickering these devices. The reasons for this unpleasant phenomenon can be several.

помогут советы экспертов. To understand why the LED lamp flashes, expert advice will help. They will also be able to explain how to get rid of such a problem. You can eliminate the flicker by setting its cause.

Lamp device

, необходимо уделить внимание ее устройству. To understand why the LED lamp flashes , you need to pay attention to its device. In other types of instruments, such problems have never been found. If the owners used incandescent lamps, the voltage from the mains supplied to them in a spiral. It was an element of resistance.

The structure of the LED lamp is much more complicated. Inside this device is a converter. The electric current when the device is turned on comes from the base to it. Just bypassing this driver, power is supplied to the LEDs. The quality of the current flowing to the LED elements depends on the converter circuit.

In expensive lamps of well-known manufacturers, the driver is able to convert an unstable voltage of a variable nature into a constant source of energy. The current is highly stable. It can not be affected by external negative factors of the network (interference, swings).

A poor-quality device

, причиной может быть недостаточное качество прибора. If the LED lamp flashes , the cause may be insufficient quality of the device. In cheap varieties of LED-illuminators, instead of a driver, a power supply unit with an extinguishing condenser is installed. Also such a device has a capacitive filter installed on the LED bridge. This does not allow the device to fully operate under adverse external influences.

A poor-quality device can flicker because of the drawbacks of its design. Moreover, such a situation can be observed both after switching on and after shutdown. Cheap varieties of lamps with a power unit are used in utility rooms, corridors. But for illumination of living rooms (especially children's rooms), high-quality devices should be purchased.

Flicker affects your eyesight. Eyes quickly become tired. Also, mental activity and disability decrease. If the device ripples above 20%, it is not recommended to read, write or work on a computer in such lighting.

Flicker of the lamp on

There are several reasons why the LED light is flashing. First of all, this includes poor-quality installation. If the contacts of the circuit are not connected reliably, this leads to various unfavorable phenomena. One of them is the flicker of the LED device.

When connecting the wires, the correct polarity must be observed. If the conductors are color-coded, the connection is made easier. But in old houses it is necessary to use a special device. It will help to find out where the wire is "phase" and "zero". Otherwise, there will be a small voltage in the circuit at all times. This will cause the light to flicker.

Sometimes it is possible to solve the problem after replacing the old transformer with the power supply for the LED strip. In this case, the flicker in the on state should stop.

Flicker of a switched off lamp

Sometimes it happens that the LED lamps flash when the light is off. This is also a fairly common phenomenon. Most often, two factors cause this. The first of these is the installation of a switch with illumination. The chain then opens, but not until the end. The current flowing into the LED gradually charges the LED-lamp capacitor. It is in the driver. In this case, the light bulb can flicker or emit a faint glow.

The second common reason why a switched off LED light flickers may be its insufficient quality. Even with a backlit switch, the device of known, proven manufacturers will not flicker. They are equipped with capacitors with increased capacity. The cost of such lamps is higher, but the problem of flickering when using them almost never arises.

These are the main causes causing an unpleasant flicker. However, when determining the cause of such a phenomenon, it is also necessary to take into account the frequency of outbreaks.

The nature of the outbreaks

The light bulb can flicker periodically or continuously. The cause of the unpleasant phenomenon depends on this. , причиной может быть недостаточно высокое напряжение в бытовой сети. If the LED lamp constantly flashes while it is on , the cause may be insufficient high voltage in the household network. This does not allow the starter to light the appliance. The deviation of the mains voltage in this case is more than 5%. If the cause is not eliminated, the device will fail before the manufacturer's stated time.

In case of power surges in the network, it is also possible to have a constant flicker when the light is on. In this case, you will need to purchase a stabilizer.

If the lamp is flashing in the ON state only the first 10 seconds after the power is applied, the starter has failed. It needs to be replaced or purchased a new LED-device.

When there is a periodic flashing of the lamp in the off state, the cause may be a source of powerful electromagnetic waves. This situation can occur if you bring the device, for example, to the TV on. Such sources of electromagnetic radiation include radio stations, power lines, as well as transmitters of mobile operators.

Troubleshooting incorrect wiring

с определенной периодичностью, в первую очередь нужно проверить правильность ее подключения, а также соответствие параметров электросети требованиям производителя. If the switched off LED lamp flashes at a certain periodicity, first of all, it is necessary to check the correctness of its connection, as well as the conformity of the power supply parameters to the manufacturer's requirements.

The phase conductor must be connected to the corresponding switch contact. It is considered incorrect connection, in which polarity is not taken into account. Such an electronic circuit will be under a small voltage all the time. To remedy the problem, the wires need to be reinserted and replaced.

If after that flicker is still present when the power is off, there may be an induced voltage. Even if the wire is disconnected, the potential may appear if a different cable is connected in parallel with it. In this case, only the repair of the wiring will solve the problem.

Light switch

, может быть выключатель со светодиодной подсветкой. The reason why the LED light is flashing is that there may be a switch with LED backlighting. In this case, flashes are periodic, and their power is low. The backlit switch has a neon or LED indicator. A small amount of current passes through this device. This voltage is sufficient to charge the capacitor. At the time of discharge, the lamp lights up and the cycle repeats again. This problem is typical for most lamps with a control unit instead of a driver.

If the owners of such equipment do not have the skills of repairing electrical equipment, it is better to replace the switch or purchase a new lamp of high quality (with a driver and a high-capacity capacitor). You can also try to disconnect the diode on the switch from the mains.

You can also solve the problem if the flicker is detected in a chandelier with several cartridges. Instead of a single LED-device, it is necessary to screw in an incandescent lamp of any power. This element will take over the function of the shunt resistor. The presented solutions are considered safe from the point of view of fire safety.

Condenser or resistor

, можно устранить это явление при помощи добавления в схему конденсатора или резистора. If the LED lamp flashes after shutdown , you can eliminate this phenomenon by adding a capacitor or resistor to the circuit. The additional element is connected in parallel to the lighting device. It is placed on the back of the switch or inside the lamp holder itself.

In the first case, an unpolar capacitor is acquired. Its capacity should be 0.1-1 μF. This device must withstand a voltage of 630 V. Most often, for similar purposes, a metal-film type capacitor is used. Such a circuit element will not heat up, and it will also be able to compensate for network interference.

If an additional element is planned to be mounted in a cartridge, you need to buy a resistor with a resistance of 1 MΩ and a power of 0.5 to 1 W. Its dimensions will be 3 times less than the capacitor.

If the switch has 2 keys, you will need to include two capacitors or two resistors in the circuit. However, it should be noted that adding such elements to the lighting device is unsafe. With minor errors in connection, the probability of a fire hazard situation increases. The resistor and capacitor must not touch the housing or wire. It is also recommended to use heat-shrinkable insulating tubes.

Low mains voltage

, проблема может заключаться в низком напряжении сети. If the LED lamp (included) is flashing , the problem may be a low mains voltage. Residents of some cities and rural areas face such problems. If it is not possible to solve the issue with the electricity supplier, residents of such areas should purchase exceptionally high-quality devices. They can operate in the voltage range of the network from 180 to 250 V.

In the presence of insufficient voltage in the network or its differences, the owners are recommended to install a stabilizer. This device is able to extend the operation of all electrical appliances in the house.

Dimmer application

Not only does the low voltage of the network explain why the LED lamp is flashing. If the device is connected via a dimmer, this can lead to similar troubles. Switching the lamp through such a device not at full power will cause flicker when the light is on. When the power is increased by means of a dimmer, the light will stop blinking.

In this case, it is recommended to connect the device without voltage-lowering devices. Also, you can set the dimmer knob not to the extreme positions.

Additional interference

If, when such problems arise, the owners did not manage to establish the cause of the malfunction, the question arises as to what to do. при наличии в квартире или рядом с домом мощных источников электромагнитного излучения. The LED lamp flashes when there are powerful sources of electromagnetic radiation in the apartment or near the house. Before connecting, it is necessary to exclude the possibility of their influence on the device.

First you need to determine which devices in the room can create additional electromagnetic pulses. If the problem is not determined indoors, then there is a powerful radio transmitter on the outside. In this case, owners are advised to use expensive, high-quality lamps. They will not flicker.

Manufacturer

с небольшой частотой, это явление может быть незаметно для человеческого глаза. When the LED lamp flashes at a low frequency, this phenomenon may not be noticeable to the human eye. However, the negative effect of flicker may appear over time. The eyes, the head begin to hurt, the working capacity decreases. In this case, most likely, the culprit is the power unit.

Manufacturers should indicate the parameters of the pulsation of the device on the packaging. However, some little-known manufacturers do not fulfill these requirements. They can also provide untrue information about this indicator. Determine the real value of pulsation is possible only with the use of special equipment.

To prevent the appearance of pulsation and vision problems, it is necessary to give preference to buying proven brands. Their products cost a little more, but this is a profitable investment. Quality devices can work for several decades. With their proper connection and operation, there is no ripple problem. Even in the presence of adverse factors (switch with backlight, poor wiring, electrostatic interference, etc.), similar devices will work correctly, without flickering.

каждый пользователь сможет устранить неприятное явление самостоятельно. Having considered the reasons why the LED lamp flashes, each user can eliminate an unpleasant phenomenon on his own.