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LED lighting can cause radio interference
Topic Started: 3 Sep 2011 - 12:07 (2,848 Views)
MadMark1
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LED lighting can cause radio interference

Thilo, DL9KCE, writes on the IARU Region 1 site of the problems LED lighting can cause.

More and more LED lights are entering the market and are being used by radio amateur and their neighbors. There is a limit to maximum disturbance voltage on the mains port defined in EN55015, which is equivalent to the protection of EN55022, however it is not fully implemented within the EU due to a transition period of the standard.

As consequence, we can observe some LED lights causing only little trouble, others however cause a great amount of harmful interference due to mains line radiation. As worst case, we identified some LED lights which could be as far as 40 - 60 dB over the limit on some frequencies.


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to right mark may be eco friendly but radiat more . i have eco lights in my house and when switched on you can tell by 1 .2. sig on meter the new way we live . :cheers: :pirate:
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M5AGV
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It’s not the LED lamps that are the problem, but its some of the drivers that are available, that are used to power the LED lamps. The mains voltage ones i.e. the GU/GZ10 ones, do not seem to be a problem.
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MadMark1
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True, Its not the actual LEDs that are at fault but the power supplies that run them.


Mark
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M5AGV
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I have a wide experience of lighting design and specifying lighting systems. The main problem in the industry is the components to make lighting systems work are getting cheaper and then short cuts are taken on the component design side, which then can lead to EMC issues.

It’s like CFL (compact fluorescent lamps) some of the cheaper ones that I have had on test in the past are EMC nightmares and radiate so much noise; they cannot be tested to European standards.

I would also be very careful with the so call CE markings on lighting components, as CE not only stands for "Conformité Européenne" but also stands for “China Export” and both symbols look the same.
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VoG
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3 Sep 2011 - 15:07
It’s like CFL (compact fluorescent lamps) some of the cheaper ones that I have had on test in the past are EMC nightmares and radiate so much noise
I have a few tree-hugger lights in my QTH and some of them are DAMN noisy whereas others are apparently silent. I've compared one of the Noisiest with one of the quiet ones and there is NO obvious difference in marking, nor any other clue, at all. As a user of hearing-aids which I regularly switch to the "Telecoil" setting and use an inductive loop to listen to the radios (actually a lot more comfortable than headphones), I have found I cannot do that if the staircase/landing light is on as the their racket literally drowns the sound from the radio.

The fact that "Nanny" decided we're not allowed to buy incandescant light-bulbs anymore is just another example of State interference in our lives that hasn't been properly thought through.

With the advent of Plasma TVs, BT-Vision, Internet-via-Powerline, LED lights with cheap, inefficient switch-mode transformers, CFL bulbs that are as noisy as Bedlam, thousands of Laptops, Notepads, iPads, iPods, iPhones, Kindles, and Mobile phones all sitting in their own happy world of QRM as they charge-up it is a miracle ANY of the Bands are ever open.
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Beany
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I will second the problem is with the power surplys to the LED lighting as I light my shack with Led strip lighting but these are powered from the front of the PSU B)

So as the LEDS power source is from a radio power surply there are no noise problems at all
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Scottydog
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Dont i know it! neighbours christmas lights hammered me last christmas time,mind you they
have loads of the darn things flashing and twinkling.

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