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!
It will be useful to read:
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There was a problem after connecting the LED panel; - after turning off the panel (lights) dimly lit. The wires connecting the panel and the outlet were new and purchased at the store. After replacing the wiring (with old wires), the problem was solved - the panel no longer glowed after turning off. Conclusion: - change the wiring.
Most likely, you swapped the wires, phase and 0. If the phase is constant, and 0 is interrupted in the switch (possibly, on the contrary, it didn’t measure), then there is a weak glow of the diodes when the zero is broken (the switch is in the off position). If in the switch to make the phase intermittent, and 0 constant - the glow will disappear.
it wasn’t there, the phase breaks with the switch and the LEDs dimly illuminate (visible only at night). New copper wiring in double insulation.
Is there a loss of electricity when the lamp glows dim after turning it off?
No, you turned off the electricity - and let it not bother you if it burns there or not.
Those. can I put 100500 lamps this way and get free lighting?
But, if you unscrew it does not glow. So it consumes from the network. How much, interesting?
Teach physics, professor?
You are a genius!!! Invented the ETERNAL ENGINE,
A backlit switch, "bit off" the backlight and everything is fine. Thanks for the tip.
I read on the forum about the lezard switch- today they put a double one with an LED- of course the LEDs on the switch are not as bright as on the Makelovsky ones, but in fact the problem is solved — the LED lamps on the ceiling turned off when the switch was turned off.
Thanks a lot to the author .. The switch was backlit, broke it and voila
A weak glow in the off LED lamps is observed mainly in low-power LED lamps of 2.5 - 5 watts (even if the switch does not have a backlight). The reason for the background leakage currents from the phase wire is energized. If the next to the line from the switch to the lamp does not turn off a line, for example a line to sockets, LED lamps will glow weakly in the dark. The zero conductor is not earth at all, it always has 7 - 12 volts of voltage relative to the ground due to the uneven load of the phases of the electric network in Moreover, although the load is minimal at night, but it is all the same and its phase unevenness is very large. In addition, when adding single-phase non-uniform loads in apartments, the current in the neutral conductor is mixed, that is, the current vector in the neutral conductor does not coincide with the voltage vector , and the voltage vector itself occupies a rather arbitrary position relative to the phase voltage vectors in the electric network of the house, depending on the magnitude and nature of the load of the electric network, that is, between the phases of the electric network and zero There is always some phase shift in the conductor, which means that in an apartment between the zero conductor and the phase, the voltage can change when the load changes from, for example, 190 volts to, say, 240 volts or more. Background leakage currents having, mainly, the capacitive nature is shifted even further by the current vector of the background leakage point relative to the phase in the apartment, which leads to an increase in voltage between the phase and zero conductors of the apartment electrical network. This phenomenon can be represented as an equivalent circuit of apartment wiring in the capacitor is connected between the phase and neutral conductors, then the LED lamp is connected in series and the neutral conductor is connected to it and a voltage of 5 - 20 volts is applied between the phase and neutral conductors. In order to get rid of the glow of the LED lamps, you can connect a capacitor or switch in parallel to them must simultaneously break when disconnecting the phase and neutral conductor, such household switches are not allowed.
Good afternoon.
How to choose a capacitor? The lamp consumes up to 60W.
Many thanks. Old prefabricated house, wiring from Soviet times. I decided to try your advice with turning off the zero and phase. There really are no such switches. But as they said in the popular (in the past) newsreel "We are not used to retreat!" Two key switches were purchased, replaced the keys with one, connected the zero and phase to the active contacts, and voila, everything works! For those who will not be able to find a wide key with four pins, as an option, connect the two keys together in any way convenient for you.
An old village house, in the kitchen decided to put six LED ceiling lights. Connected in parallel, on the switch, without backlight, the phase is broken.
I noticed that when the phase is broken, the lamps continue to glow weakly. But not always, sometimes glow, sometimes (more often at night) no. That is, the parasitic harmonics slip through the neutral wire. Perhaps the neighbors include something powerful. And the line itself leading to the house stretches for two kilometers to a transformer, where consumers are connected to it every 50 meters in parallel.
As a solution, I replaced one of the LED lamps with an incandescent lamp, which shunted the LED lamps. Maybe over time, "ripen" on the capacitor.
I set a capacitor for myself, the problem is gone. But I had a reason for the backlit switch ....
Hello, the problem is this: the led panels flicker a couple of times after turning it off, it is right after turning it off, then they do not light up, and there are no problems during operation.
In this case, a two-gang switch of one panel for each is connected. The whole thing is in the bathroom, where two sockets are still connected in the box.
I'm an ignoramus in electrics, a Google apprentice level. But it seems that everything is connected correctly, the phase into the switch goes to the panel, zero from the panel immediately to the box.
Switch without backlight.
Panels are not cheap.
What could be the problem?
Probably reverse induction, it is necessary to solder the diode into the ice in the reverse order, so that it extinguishes the induction after turning off
Good afternoon!
3 months ago we moved the switch and made it double (i.e., at different ends of the corridor along the switch) we have 5 lamps of 5w each. For 3 months 4. burned out. The lamps are good with a 2 year warranty. Yesterday I suddenly noticed that 3 lamps (which are connected there now) give a dim light, and tonight one of them even shone very strongly, I pulled it out (out of harm's way, and the other 2 lit up brighter, pulled out the 2nd, and the last lit up even brighter, I had to pull everything out. This is the main question, how dangerous is it if the matter is in the wiring? (just did the repair) will have to open everything, apparently?
Hello! Yes, of course, you need to open everything and check the connection diagram of the fixtures.
Hello! Help! In one room there is a chandelier with 3 lamps, so in this chandelier the bulbs constantly burned out, then they changed the bulbs to LED ones and when they are turned off they glow dimly and the two-key switch only works for one key. In the other room there is also a chandelier with 3 lamps, so there three lamps do not want to burn at the same time, they immediately start blinking and one is lit very dimly. What is the problem? help me please
Hello! The problem is most likely that the wires are mixed up, it is possible that the gap goes to zero, and not the phase, you need to watch how everything is connected, to ring.
Thank! And where exactly is it checked? Where does the chandelier connect to the wires? Or in another place? Or throughout the wiring? Damn, as luck would have it, the only electrician in the village left
This is checked first of all on the light switch and where the chandelier is connected. But without experience, this is not necessary!
Thank!
And how does the meter behave in this case, does it shake or not?
The meter will not wind electricity, do not worry!
good day, I put the diode lamps and transferred the switches, I plastered the bunches of wires - now the lamps glow when the state is off, maybe when the plaster dries, they stop glowing? or break a wall and isolate twists?
Good afternoon! 5-horn chandelier. It has LED bulbs. They’ve been burning for more than six months, there are no complaints. Yesterday, one of them, after turning off the light, continued to burn with dim light. Burned all night, in the morning I was afraid to leave her unattended for the whole day and unscrewed. Nobody changed anything. What to do, why did it light up after turning off the light? thank
There should not be near the phase conductor from the switch to the LED lamp
other phase conductors to power other luminaires. Use only the single-key switch to turn it on.With a two-key switch, the LEDs will be dimly lit when the second key is turned on, even without a load, that is, without a second lamp, but simply with “idle” wires.
We put a LED chandelier, on the very first night we noticed that off. all LEDs are dimly lit ... they read your article, checked, and it’s true that the switch opens zero, but it’s the only one that comes to the switch, they looked at how to change zero to phase and it turned out that the box is wired up ... they bought a 155k 400V capacitor on the radio market, connected directly to parallel chandelier, effect zero ... what to do?
In the introductory shield, find out which automaton this chandelier is powered from and replace the wires with places, but you need to make sure that the electricians did not use the neutral wire as a ground wire ...
Hello! There is a question, but not a comment. At the factory, there are remotely standing mechanisms, an alarm was taken from them, the KM-24-95ma type lindens used to be there, the lamps were replaced with LED ones - the backlighting of the LEDs almost started. And all this is observed only on remote mechanisms, alarms at neighbors without backlight. The voltage is rectified 19-20 volts (instead of 24v). Tell me - what can be, and how to get rid of the backlight! Thank!
Good afternoon. I hung a diode floodlight with a power of 70 watts. After turning it off, it lights up slightly, there is a simple switch, no indicator. Please tell me what is the reason?
Instead of a phase, a zero is connected to the switch.
Good night, today the ladies have a led lamp installed in the room. In the dark, I noticed that it was lit (backlit switch). But suddenly he blinked very brightly, I thought that it seemed, because she was in another room. But the flash repeated. I turned off the entire apartment, touched the lamp, not hot. What could it be?
I put the capacitor in parallel with the LED lights and everything was fine, it didn’t blink, but then I put the same lamp, but it’s both with a capacitor, with resistance and without barely glowing, what should I do? what could be? cut backlight in switch extreme option!
In the kitchen, a pair of LED lamps such as the Chinese "ERA". There was a replacement counter - now in the off state they glow. The counter is working fine.
In the photo, I am confused by the wires. Go past the phase zero and ground.
But how are the lamps and the counter connected? and why do you have “protective” color phases? Also in the photo it is not clear why you consider these wires to be phase and zero. What does “past phase” mean?
Good evening!
Please tell me, there were halogen bulbs in the chandelier, changed to ice.
Illuminated switch. But the new ice turned on very dimly only when he pulled out the last gallogen.
Could there be a problem in the wiring, or will the lights glow in all the backlit switches?
And why if there is all the ice and one halogen, they will not glow?
“But the new ice turned on very dimly only when I pulled out the last gallogen.” Mean in the off state? It should be so.
In almost all backlit switches, the lamps will be lit. They will not shine only in those switches to which the phase and zero are connected (but here it is necessary to lay a zero to the switch), such LEGRAND has in the catalog, if I'm not mistaken).
Read the article, why are you asking questions?
They are lit because when the switch is off, the backlight is connected in series through the lamp. If there are halogens or incandescent lamps, then when the backlight is on, its current goes through the backlight and through the lamp in the lamp, the current is small, and it is not enough to light these lamps.But enough for the LED glow.
When there are a lot of lamps in the lamp and all are LED, and one of them is halogen, then the backlight current roughly goes through it.
In order for the backlight to remain and the lamps do not blink, then connect in parallel to the lamp (you can directly to the contacts of one of the lampholders or to the terminal strip, between the phase from the switch and zero) a 0.1 μF and 630 V capacitor or a 50 kΩ resistor and 2 watts of power. If the lamps still flash, then gradually reduce the resistance of the resistor, controlling its heating or increase the capacity (if a capacitor is installed). The condenser is better here because it will not get so warm.
the lamp is dimly lit when the light is off, the switch without backlighting what can be and how to eliminate the cause
Read above, do not be lazy, questions are repeated
I have a reason for the cheapness of the bulb. I cut down the lamp from the outlet, and it continues to go out slowly. In this case, when screwing, the glass head scrolls in plastic. A nightmare of some kind. I do not remember the manufacturer. But the color of the box is blue, glossy with a bunch of color icons. Took in Auchan.
In my corridor, the bulb keeps on glowing quite a bit after being turned off, which is sooooo convenient when you go to the toilet at night. It is very very slightly faint, it’s right !!! Thought where such a cool bulb came from? Others do not shine .. In short, I began to search on the Internet, it turns out this type is bad .... Yes, my dears, it can be sooo easy even! It is a pity that she will not live long (as I learned from an Internet) ... As Nikulin said: "..will look .."
to the account “will not live long” - this is not an exact statement. and you’re right. By the way, look at the xiaomi philips fixtures, some of them have a cool “moonlight” mode, that's just when they barely glow.