LED lamp flashes after turning on - what should I do?

Recently, new light bulbs have replaced them, they are called LED light bulbs. They significantly save electricity, and shine no worse than their old counterparts. And they are very convenient for the design of stretch ceiling, especially multi-level. However, users are increasingly faced with the problem of flashing lamps. In this article we will answer the most common question of users of such fixtures: The LED lamp flashes after switching on, what should I do?

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How are energy saving lamps arranged?

When the most common light sources were incandescent lamps, no one thought about the problem of flicker. The mains voltage was applied directly to the spiral itself, which acted as a load resistance.

The device of the proposed lamp differs in its complexity. Nowadays, light sources include a so-called electronic transducer, which can take the form of a driver or a voltage source.

Consider each detail of the lamp:

• Cap. It is made of brass with a nickel coating - this provides good contact with the cartridge. In addition, such material is not afraid of rust.
• Polymer base of plinth. It is made of polyethylene terephthalate - this material contributes to the high protection of the housing from piercing by current.
• Driver. It is responsible for stable operation of the device even with active voltage drops. A driver malfunction may be the reason that the energy saving lamps flash after turning off.
• Radiator. It is made of anodized aluminum alloy. Such a withdrawal is very effective, which can not be said for a tap from ordinary aluminum.
• Printed circuit board made of aluminum on heat-conducting paste. This part makes it possible to remove heat from the chips directly to the radiator - this guarantees a constant temperature regime during the operation of the chips.
• Chips.
• Diffuser. It is a light-scattering hemisphere.

Consider the principle of energy-saving lamps. When we turn on this device, the path through which the current flows flows from the cap to the voltage converter, and then to the LEDs themselves.

Important! The quality of the current depends directly on how complex the converter circuit is. At the same time, the quality of the luminaire directly depends on the quality of the driver, which is responsible for any network drops and frequency interference.

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Causes of flashing of the LED lamps when the light is off

Why are the LED lamps flashing after being turned off? To answer this question, it is necessary to understand the main causes of the malfunction. There may be several, and each of them must be considered in detail.

Problems with

wiring There can be two reasons:

• If you are faced with the problem of a flashing light bulb, first of all, you need to check where the phase conductor comes from the distribution box. It can go to the switch contact or to the LED device itself. The correct option is the first case - the phase wire must come to the contact of the switch. Otherwise - the circuit will be under the potential, which is why it will not be possible to get rid of the blinking of the lamp.

Important! Using an indicator screwdriver, you can easily distinguish between phase and zero wires.

• If the first item is OK, but, as before, the LED lamps flash after turning off, then the cause may be induced voltage or, more simply, network interference. The potential on the disconnected wire can appear, if a different power wire has already been laid parallel to it.

Important! To think about replacing the wiring is when the LED bulb is operated by a conventional switch that does not have a backlight. Otherwise - first you need to find out about other options for solving the described problem.

If the switch has a backlight

Replacing an incandescent lamp with a luminaire connected to a lighted switch may result in short flashes with low power. So why do LED bulbs blink after shutting down? The answer lies in the fact that in the de-energized state, a so-called micro-current passes through the LED, which will be sufficient for ignition, but the charge is sufficient only for a short flash.

The problem described applies to all bulbs that have an electronic control unit. These bulbs are usually:

• LED.
• Fluorescent.

Remove unpleasant flashes possible using only a resistor or capacitor, which must be connected in parallel with the luminaire. What to do to solve the problem:

1. To place the radio element inside the cartridge or from the back of the switch inside the cartridge - this is necessary for the convenience of further work.
2. In the first case, you have to select a resistor with a power of 0.1 to 1 W.In dimensions, it is about three times smaller than the capacitor, and this is a useful factor, especially if space is limited. Also worth noting is the small cost of the resistor.
3. Otherwise, you will need a capacitor with a capacitance of 0.1-1 μF.It is necessary that the element be nonpolar and capable of withstanding a voltage of 630 V. The best option would be to install a metal-film capacitor with "104-630V" written on the side.
4. If the switch is two-key, it is necessary to arm two elements for each group of bulbs, and then remove the flickering of the LED lamps.

Important! Both of these elements are fire hazardous. During the procedure, you can not touch any wiring, as well as the body of the electric fittings.

If the lamp has several cartridges that are connected in parallel, then the problem is solved without using additional electro elements. To do this, you can simply screw in a light bulb with the power you have selected in the nearest ceiling. It will accept the position of the shunt resistor.

Cheap fixtures

Often, users purchase inexpensive, which means - low-quality LED light bulbs. This is due to the limited budget of citizens. A capacitor with a capacitance of approximately 4.8 μF is usually connected to the power supply of such devices, which helps to blink the luminaire.

Turn off the backlight

It's worth noting an excellent way, after using which you will most likely forget about the issue of how to eliminate the flicker of LED lamps. To do this, proceed as follows:

1. Remove the switch.
2. Find its electrical contacts.
3. Remove the backlight.

Although this solution is radical, it is very simple and effective. The main thing is that you get rid of the annoying problem.

In this article we dealt with the main faults of the luminaire and told what to do if the energy saving lamps flash after switching on. Following our advice, you will forget about this problem for a long time.