eHam.net - Amateur Radio (Ham Radio) Community

Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net



[Articles Home]  [Add Article]  

LED Lighting Equipment May Cause Severe Electromagnetic Disturbances:

from iaru-r1.org on September 6, 2011
View comments about this article!

LED Lighting Equipment May Cause Severe Electromagnetic Disturbances:

See the full story here:

LINK

Member Comments:
This article has expired. No more comments may be added.
 
LED Lighting Equipment May Cause Severe Electromagnetic Dist  
by K1CJS on September 6, 2011 Mail this to a friend!
It isn't the LED lighting that causes interference, it's the power supply for that lighting. I'm surprised at this one--that a radio society would either leave out or purposefully ignore that one fact.
 
RE: LED Lighting Equipment May Cause Severe Electromagnetic  
by EMRAD on September 6, 2011 Mail this to a friend!
I agree. If the LEDs are being driven by a pulse width modulation driver (I guess this is usually done for power efficiency or to control heat) you can bet the supply, the wires and the leads to those LEDs will radiate. I had to consider that fact when I was planning to build a larger display for a LED clock I have. I was going to use solid state relays to switch a larger power supply to drive this huge display I'd planned to build... then it suddenly hit me... the LEDs on that clock are pulsed, what I would have built would have been an interference nightmare!

Other lights I've built out of LEDs run series strings of them that drop 13.8 DC... no interference from them and as far as I'm concerned that's the way to go.

Emrad
 
RE: LED Lighting Equipment May Cause Severe Electromagnetic  
by W4VR on September 6, 2011 Mail this to a friend!
Most likely the power supply. I have halogen lamps under the kitchen cabinets...the power supply was manufactured in Canada...when I turn on those lights the interference is awesome on all HF bands.
 
LED Lighting Equipment May Cause Severe Electromagnetic Dist  
by K8AC on September 6, 2011 Mail this to a friend!
I'm surprised that other readers thus far have interpreted the article the way they did. Clearly, the authors are addressing "LED Lights", and not LEDs themselves. The units being evaluated are replacement lights (think of bulbs) that consist of LEDs, housing and power supply in one package. Considering that the documents were likely written in German and translated to English, the meaning was clear to me. It may also be that the common term for our "Light bulbs" in Germany is simply "lights".

It's impressive that the Germans are using such devices. We won't have those problems here as one of the political parties has already vowed to repeal the law that would eliminate incandescent bulbs in the USA. Evil things, those LEDs. See: http://articles.latimes.com/2011/jul/09/nation/la-na-adv-texas-light-bulbs-20110710
 
LED Lighting Equipment May Cause Severe Electromagnetic Dist  
by K1TWH on September 6, 2011 Mail this to a friend!
___I've had both good and bad experiences with LED lighting. The best have been bulbs from GBL and the worst was an eBay purchase. HEIT bulbs seem quiet as well. Have yet to try Sylvania nor Phillips. The eBay bulb was horrid, showing just the kind of extreme RFI the article was referring to.
___Tom Howey WB1FPA
 
RE: LED Lighting Equipment May Cause Severe Electromagnetic  
by N9PSE on September 6, 2011 Mail this to a friend!
I have no objection to LED lighting. If they're that good, I'll switch over myself. What I object to is having the decision forced upon me. I have some of the CFLs (which don't seem to be too bad on RFI). But they still don't make non-incandescent lighting that works well on a dimmer. Hence, I'll stick with conventional bulbs for some of my lights -- MY choice.
 
RE: LED Lighting Equipment May Cause Severe Electromagnetic  
by K1CJS on September 6, 2011 Mail this to a friend!
In my area, there aren't many of those type replacement bulbs. LED units are low voltage fixtures which plug into outlets or are wired into the house wiring. Most have power supplies separate from the lighting units themselves. Those power supplies are the noise makers.
 
RE: LED Lighting Equipment May Cause Severe Electromagnetic  
by KB3PDA on September 6, 2011 Mail this to a friend!
"We won't have those problems here as one of the political parties has already vowed to repeal the law that would eliminate incandescent bulbs in the USA"

Check the translation of the US proposed law. I believe it requires that the bulbs be made to be more efficient and not outrightly ban them. Much research going on in the world of conventional bulbs.
 
LED Lighting Equipment May Cause Severe Electromagnetic Dist  
by N1RKT on September 7, 2011 Mail this to a friend!
There are a lot of cheap power supply that cause noise. I have found some nice quiet ones to use here but have recently given up on them. I suffer from massive migraines when using LED lighting and I don't think it will be too many years before we find out about serious health risk from these LED lights.
 
LED Lighting Equipment May Cause Severe Electromagnetic Dist  
by N1DVJ on September 7, 2011 Mail this to a friend!
Yep, it's the power supply. Probably a direct rectified front end with a small switcher so that it doesn't need a transformer.

But why does that have to be mentioned? You don't take the things apart or buy them in pieces. You buy the 'package'.

By the way, the LED lights a lot a dragstrips use are direct powered with no switcher, so as to give the fastest response time. In fact, driver reaction time has shifted since the use of LED bulbs in the tree.
 
RE: LED Lighting Equipment May Cause Severe Electromagnetic  
by W8AAZ on September 7, 2011 Mail this to a friend!
Well if you don't get 'em, everyone else in the neighborhood may get 'em, and along with computers, and everything else from, frankly, Asian electronic manufactures that will make your ears bleed trying to work your DX. Imagine that new proposed ham band below the AM band. That ought to be a magnet for noise and might be useless in most places. But until the EMI gets so horribly bad that digital cellphones don't work, or Wi Fi, etc. nothing will be done about it, I fear. Or will be explained away that it is just too bad. Perhaps advancing technology will make ham radio extinct, but not for the reasons you expected.
 
LED Lighting Equipment May Cause Severe Electromagnetic Dist  
by NX7U on September 8, 2011 Mail this to a friend!
Amazingly enough, LEDs and their associated supplies can even be an issue in the UHF bands. My company has found several roadside LED-billboards that generate significant interference even all the way up at 750 MHz.
 
LED Lighting Equipment May Cause Severe Electromagnetic Dist  
by WA7VTD on September 9, 2011 Mail this to a friend!
What I find odd is that the offending lights are available for sale in Germany; the EU has very strict regulations about RFI-emitting devices. It's unusual that a product causing this sort of RFI would ever be approved for sale in the EU. We are, of course, deficient in this regard here in the US.
 
RE: LED Lighting Equipment May Cause Severe Electromagnetic  
by WA7VTD on September 9, 2011 Mail this to a friend!
Oh, brother. The 'evil hand of government regulation strikes again!' Yeah, OK.

"I prefer modern anesthesia to an ether-soaked rag, but I object to the latter being forced on me!"

"I prefer inspected meat that is free of maggots, rather than meat tainted by all sorts of disease-causing junk, but dammit, inspections should be voluntary! I have a right to be poisoned if I want to!"

The people griping about being "forced" to switch from inefficient bulbs are dim bulbs themselves.
 
RE: LED Lighting Equipment May Cause Severe Electromagnetic  
by N9PSE on September 9, 2011 Mail this to a friend!
WA7VTD: You misunderstand me. I'm not objecting to government regulations that deal with basic health and safety concerns, e.g., food regulations. However, if I am no longer permitted to buy an "unhealthy" food (say a Big Mac) because it is not good for me, then I object. Or force me to buy a small car because my pickup truck uses too much gas.

Likewise with light bulbs. I can't put CFLs in some of my lights because I have dimmers on them. Most CFLs don't work with dimmers; and the ones that do have low lifetimes/reliability.

Or maybe people don't want to worry about potential mercury contamination. Or maybe they don't like the quality of light from CFLs. Or maybe, they use conventional incandescent bulbs in the winter and don't mind that the inefficient lighting source also provides additional heating.

Your strawman arguments ("maggot infested meat") don't work. I'm not asking for a product that will harm me -- I'm asking for products I need or desire to NOT be regulated out of existence. It's not the government's job to save me money -- heck, they can't even do that for themselves.

I object to government picking winners and losers in the market. If lighting alternatives are better, people will buy them. If they don't buy them, maybe they have a reason.

Finally, I object personal slights (e.g., "dim bulbs") applied to someone who doesn't agree with you. If you have a valid point to make, do so. Don't insult me -- you have NO chance of changing my mind that way.
 
Email Subscription
You are not subscribed to discussions on this article.

Subscribe!
My Subscriptions
Subscriptions Help

Other News Articles
WIA: Battle to Save the 9 cm Band:
Creel's Radio Collection Given to Alabama Historical Radio Society:
Laketown Park in Kenner to Host Coast Guard Auxiliary Radio Day:
Nationwide Amateur Radio Operators Simulated Emergency Testing Oct. 11:
Ham Radio is Still the Old Standby In Emergency Situations: