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Re: [TowerTalk] CF Bulbs

To: "" <>
Subject: Re: [TowerTalk] CF Bulbs
From: Alan NV8A <>
Date: Wed, 31 Oct 2007 12:01:17 -0400
List-post: <>
I was in Sam's Club yesterday and noticed that their GE CF bulbs have a 
warning against using them close to emergency communications equipment. 
A frequency range was mentioned: the upper limit was 30MHz, but I don't 
recall the lower limit.


Alan NV8A

On 10/31/07 10:26 am Phil Camera wrote:

> My experience is as follows:
> I've replaced a number a incandescent bulbs in the house and especially in 
> and near the radio shack and have not had a problem.  Those bulbs are the 8 
> to a pack GE styles from Sams Club.  
> Now, I've done the same with the same bulbs on the two outdoor lights with 
> photoeyes.  On older photoeye units, these bulbs just burned out within a 
> week or so (they are specifically not rated for photoeyes or dimmers).  This 
> past summer I replaced these two outdoor fixtures with new that had a 
> different type of photoeye (replacement was due to old fixture starting to 
> look beat up).  I again tried these same CF bulbs and they have lasted for a 
> long time......but
> The new problem I experienced is that when these came on and stayed on, RFI 
> wiped out the AM radio (and most likely up into the amateur bands).
> I did an internet search and only found CF bulbs specifically rated for use 
> with dimmers (none stated for use with photoeyes but I thought the issues 
> were the same).  I bought a few of these dimmer rated CFs and installed these 
> and no more RFI.  Gone.
> So if you are having interference issues with CFs; you may wish to try 
> obtaining dimmer rated CFs and gives those a try.


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