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Why Does My 50W LED Lamp Glow Dimly After Being Switched Off? Types of Energy-Saving Bulbs

p_m1 123891 11
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Why does an LED lamp continue to glow faintly after the switch is turned off?

An LED lamp can keep glowing faintly after switch-off because a small leakage current from the switch or wiring, or even the installation’s capacitance, is enough to make it emit light [#8884629] This happens especially when the switch breaks the neutral wire instead of the phase wire [#8884629] A very common cause is a backlit switch: its indicator circuit can feed the LED lamp, so the lamp still glows when off [#8884735][#9013738] You can check this by temporarily replacing the LED bulb with a normal incandescent bulb or by disconnecting the switch backlight [#8884735] If the glow disappears after changing to a regular switch or removing the backlight, that confirms the cause [#9013738][#8888102]
Summary generated by AI based on the discussion content.
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  • #1 8882650
    p_m1
    Level 11  
    Posts: 31
    Rate: 14
    I heard that an energy-saving lamp is also halogen (light bulb), energy-saving, led etc.
    1.My question is about the division, does anyone know what it looks like?
    2. Why is the 50W home LED lamp still on after turning off the power (it is known that it is darker, but it shines)?
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  • #2 8882659
    kkas12
    Level 43  
    Posts: 17380
    Help: 1076
    Rate: 4288
    Hello!

    Quote:
    Why is the 50W home LED lamp still lit after the power is turned off? (You know it's darker but it shines)
    This is the broadly understood energy saving.
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  • #3 8882678
    p_m1
    Level 11  
    Posts: 31
    Rate: 14
    kkas12 wrote:
    Hello!

    Quote:
    Why is the 50W home LED lamp still lit after the power is turned off? (You know it's darker but it shines)
    This is the broadly understood energy saving.


    I mean, the light is on in the bathroom for about 20 minutes, then I go out - I turn off the electricity and it still shines, only darker.
  • #4 8882727
    goldi74
    Level 43  
    Posts: 8058
    Help: 1367
    Rate: 1538
    p_m1 wrote:
    i.e. I mean that I am in the bathroom, the light is on for about 20 minutes, then I go out, turn off the electricity and it still shines, but it's darker.


    And you don't have backlight switches?
  • #5 8883709
    Akrzy74
    Rest in Peace
    Posts: 7910
    Help: 363
    Rate: 1503
    Buddy, it's obvious you have a question (I mean the title) - that's why you assumed this topic. So describe your problem in detail and do not theorize, because the topic will end up in the trash!
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  • #6 8884629
    Mariusz Raczek
    Level 28  
    Posts: 722
    Help: 131
    Rate: 43
    Some LED lamps shine after switching off because the minimum leakage current of the switch or installation is sufficient for them, even the electric capacity of the installation is enough to observe a weak glow. This phenomenon occurs especially when the switch is in neutral instead of phase.
    Greetings.
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  • #7 8884735
    barteqqq
    Level 21  
    Posts: 589
    Help: 18
    Rate: 99
    As for your 2nd point, I heard that when you have a lamp button / switch with a backlight, the backlight turns on when you turn off the lamp - most often it is a small 230V bulb, rarely an LED diode - and in this case the LED bulb is so sensitive that it works in the same circuit what backlight - you can easily check it - instead of a LED bulb, screw in an ordinary light bulb or with a LED bulb, remove the switch's backlight from the circuit.
  • #8 8884842
    kubapass
    Level 10  
    Posts: 6
    Rate: 4
    I observed a similar phenomenon in the lead. Maybe it's moisture?
  • #9 8888102
    barteqqq
    Level 21  
    Posts: 589
    Help: 18
    Rate: 99
    p_m1 wrote:
    barteqqq wrote:
    As for your 2nd point, I heard that if you have a lamp button / switch with a backlight, the backlight turns on when you turn off the lamp - most often it is a small 230V bulb, rarely a LED diode - and in this case the LED bulb is so sensitive that it works in the same circuit what backlight - you can easily check it - instead of a LED bulb, screw in an ordinary light bulb or with a LED bulb, remove the switch's backlight from the circuit.


    then it shines all the time as if it works in this circuit and it goes out after time


    magpies :) I wanted to write that it works as if in the same circuit as the backlight - do as I wrote, you will know what it is about. I had the same with LED bulbs and a button with a backlight, and just like I used to buy an "energy-saving" bulb at TESCO for PLN 2.50 and installed it at night, you could see how it gently glows and sometimes even flashes - that is consumes electricity all the time, it stopped burning only when I turned off the fuse ("esa")
  • #10 8973156
    Szakul321
    Level 1  
    Posts: 1
    Rate: 15
    I have a similar problem, so not wanting to start a new thread, I reheat this one.
    I replaced the halogen bulbs at home with LED ones (in the hall I have a wall lamp for two bulbs, and in the bathroom I have one built into the lowered ceiling-3) After turning off the light, they still glow slightly. I will only add that in the bathroom I have a switch with a lamp, but not in the hall, so there is probably no problem with that .... As I gave a stronger light bulb, there is no lighting after switching off. What to do?
  • #12 9013738
    Elektrostick
    Level 10  
    Posts: 52
    Help: 1
    Rate: 16
    Hello, if you have a connector with backlight, it is possible that it is inducing I had similar problems on the site, replace it with a regular connector and it will be ok

Topic summary

✨ The discussion revolves around the phenomenon of LED lamps remaining illuminated, albeit dimly, after being switched off. Users speculate that this could be due to residual current from the switch or installation, particularly if the switch is wired incorrectly (neutral instead of phase). The presence of backlit switches is also highlighted as a potential cause, where the backlight may draw enough current to keep the LED bulb glowing. Users suggest testing the circuit by replacing the LED bulb with a traditional incandescent bulb or removing the backlight from the switch to confirm the issue. One user shares a personal experience of replacing halogen bulbs with LEDs and encountering similar dim lighting after switching off.
Summary generated by AI based on the discussion content.
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