Why does the LED lamp glow off?
Overview of the reasons for the glow
What to do if the LED lamp is on? There are several reasons why, after turning off the light, the LED lamp remains on, even if it is dim or weak:
- low-quality insulation in the area of the electrical circuit or any other malfunction of the wiring;
- the switch to which the LED lamp is connected has a backlight;
- low-quality emitters are used in the design of the light source;
- special functionality of the lighting element.
Is this glow dangerous? For wiring, this problem does not pose any danger, however, the life of LED bulbs will be noticeably reduced if they constantly flash or glow dimly.
If the switching device is in the off position, and the emitter is still lit and lit, it is best to first check the last three factors. This is explained by the fact that it is very difficult to find a weak insulation section in the electrical wiring.
In order to do this, it is necessary to create special conditions, as a result of which a high voltage is applied to the circuit for one minute to cause a breakdown. The section of the circuit due to which the lighting element is lit after the switch is turned off will need to be opened. In this case, if the wiring was laid in a hidden way, then opening will lead to damage to the integrity of the wall.
It's important to know! There are many situations where when connecting LED light sources to a backlit switch, they function differently. This is due to the fact that the lighting element, which is installed in the switching device, closes the circuit, respectively, passes a small current. That's just what he charges and allows the bulb to glow when the switch is off.
Another problem why the LED lamp glows in the dark is the cheapness of the product. If a poor quality LED bulb was purchased, this can also lead to a similar phenomenon. This is due to the fact that there is some kind of error in the board. But it also happens that the emitter burns dimly due to the fact that it has its own peculiarity in the functioning of the structure.
We are talking about the processes that occur in the capacitors at the time of the load on the lighting element. When an electric current passes through the circuit, the capacitor accumulates energy, and then after the termination of the supply of the load continues to maintain the glow in the elements.
Another fairly common reason for the glow of LED lamps when the switch is off is an incorrect connection. You can learn more about this from the video:
How to fix the problem?
If the LED lamp is on when the light is off, how can I fix this? There are various solutions. It all depends on the nature of the problem itself. For instance:
- A cheap low-quality LED lamp always glows in the dark after it is turned off. To fix this problem, you need to replace it with quality products from a trusted manufacturer.
- If the lighting element is on due to the use of a backlit switch, this problem can be solved in different ways. For example, the easiest way out is to change the switch in the house to a normal one, without backlight. You can simply cut off a specific wire that powers the backlight. This can be done after the switching device has been opened. But there is another way out - to maintain such a function, it is enough to put a resistor in parallel on a certain section of the electric circuit.
- If the LED light is on and the reason is in the wiring, then solving this problem will be extremely difficult. To fix it, you need to find a place leakage current. But this can lead to certain difficulties. But then, when the light turns off, the bulbs will not light. About, what are the faults in the wiring, we told in a separate article. There is another way, more simple. When the lighting element is on, it is necessary to connect a load in parallel (relay, incandescent lamp or resistor). It is only necessary to take into account the fact that the resistance in the connected load should be lower than in the light emitter. And as a result, the leakage current will go to this load, but due to the fact that the resistance is insignificant, it will not glow.
Another effective way to eliminate the glow of LED bulbs is to add a capacitor to the circuit. This is described in detail in the video tutorial:
A variety of methods allows you to solve the problem of the glow of emitters with diodes so that they will not glow in full heat when the switch is turned off. The main thing is to understand the root cause of the problem. We hope that now it has become clear to you why the LED lamp lights up after being turned off and what to do to correct the situation!
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