Why is my induction light bulb buzzing
LED lamp flickers - that could be the problem
Modern LED light sources are now the standard in most offices and shops, and more and more people are relying on the new technology at home too. Compared to conventional light bulbs, LEDs consume far less electricity and last much longer, so they are very economical in the long term. Even so, LEDs are not immune to malfunctions. If an LED lamp flickers or flickers, it can quickly get on your nerves. We'll show you how the malfunction can occur and how you can fix it quickly and easily.
Minimum load, transformer & Co .: Technical terms explained
When it comes to problems with LED lamps, certain technical terms cannot be avoided. For a better understanding, here is a brief overview of the terms used:
Transformer: Electrotechnical device that converts the voltage from the socket in such a way that lamps and other household appliances can work with it.
Minimum load: Power (watts) that a device (e.g. a lamp) must request from at least one transformer in order to function.
Low voltage: Very low voltage that is safe even in the event of an electric shock.
Capacitor: Electronic component that stores energy, processes the electricity and, if necessary, compensates for fluctuations in electricity.
What to do if the LED lamp flickers regularly?
When an LED lamp flickers, it does so relatively regularly in most cases. One of the most common causes of such flickering is that Use of an unsuitable transformer. If you use LED lamps with a low voltage (mostly 12 volts), they work with a transformer, which regulates the voltage from the socket so that the lamps can work with them.
Most houses and apartments now have such transformers. If these are a bit older, however, they often give out a fluctuating output voltage, which can lead to flickering lamps.
Another problem with older transformers: Many LEDs work with very low wattages, so they do not achieve the required minimum load. Older transformers are usually designed for higher wattages and cannot cope with the energy-saving LEDs. The result: the LED lamp flickers.
The solution: Replace the old transformer with a modern LED transformer or install a new transformer in the house. The best thing to do is to consult a specialist.
If an LED lamp flickers regularly, so can an inferior capacitor in the LED lamp the problem will be. Earlier lightbulbs reacted very slowly to power fluctuations, so that they were hardly of any consequence even with a bad capacitor. Modern LEDs, however, react more quickly and any fluctuations in current become visible as flickering.
The solution: Buy high quality LED bulbs. Pay attention to test symbols such as EMC, ENEC and GS. If in doubt, ask an employee at the electronics store.
When a dimmable LED lamp flickers
If a dimmable LED lamp flickers or flickers, this is often due to the low wattage of the modern light sources. The economical ones LEDs often do not reach the minimum load and “under-demanding” the dimmer of the lamp. The result: the light flickers.
The solution: You need a new, LED-capable dimmer for the lamp or, alternatively, a completely new lamp with a suitable LED dimmer.
Alternatively, it can also be due to the light source itself if a dimmable lamp that is operated with LEDs flickers. LEDs are basically a bit more complex than normal light bulbs, therefore not all LEDs are dimmable. If an unsuitable LED light source is used in a dimmable lamp, this can cause flickering and flickering.
The solution: When buying, make sure that the LEDs are dimmable if you want to use them in a lamp with a dimmer. You can usually find a note about this on the packaging, or you can simply ask a specialist in the electronics store.
Irregular flickering of LED lamps
If an LED lamp flickers irregularly, i.e. only sometimes and at different intervals, troubleshooting is more difficult.
It is conceivable that that Broken power supply unit on your LED lamp is, for example, there is a loose contact or another defect. Check this by inserting a different LED light source into the lamp. If the light still flickers, the power supply unit is probably actually broken.
As a cross-check, screw the original light source into another lamp. If it also flickers there, it is probably due to the light source.
The solution: Check if the problem is with the lamp or the light source. In the first case, replace or repair the power supply unit, in the latter case you can simply replace the light source.
The LED lamp continues to glow after switching off
Some LED light sources continue to glow for a certain time after being switched off. If you take out the lamp and it is still lit, this is due to the stored energy in the luminous layer or the residual current in the LED driver inside the lamp. This is nothing to worry about and can be ignored.
However, if the LED continues to glow, it may be due to a faulty electrical installation or unsuitable dimmers if the lamp concerned has a dimming function. In this case, you should seek advice from a specialist who can fix the problem so that the LED lamp does not consume electricity unnecessarily when it is switched off.
Faults and flickering when switching on an LED lamp
Some LED lamps only flicker when switched on. In this case, the power supply is often to blame. The power supply unit often needs a certain operating temperature in order to work constantly. Until this is reached, the light of the LED lamp can flicker. However, if these disturbances have only recently occurred when switching on, it could also be due to the capacitor.
The solution in both cases: Buy a higher quality LED lamp with a good power supply unit and capacitor.
Once the cause has been found, the solution is usually simple
If an LED lamp flickers, there can be many causes. These range from unsuitable lamps or dimmers to outdated transformers in the house. Last but not least, the quality of the light sources is also crucial. Fortunately, most problems can be fixed quickly and easily using the tips above. In complicated cases, such as those relating to in-house electrical systems, you should, however, ask a specialist for advice.
Disclaimer OTTO (GmbH & Co KG) assumes no liability for the correctness, topicality, completeness, effectiveness and harmlessness of the information and recommendations made available on updated.de. It is expressly pointed out that the official manufacturer's specifications must be observed before all other information and recommendations and only these can guarantee a safe and proper use of the respective purchased items.
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