Subject:  Re sodium street lamps (fwd)
Date:     Sat, 11 Apr 1998 145055 -0500 (CDT)
From:     "Roy L. Beavers" <rbeavers@llion.org>
To:       emfguru@hotmail.com
--------------------------------------------------


---------- Forwarded message ----------
Date: Sat, 11 Apr 1998 18:40:02 +0200
From: Clas Tegenfeldt 
To: "Roy L. Beavers" 
Subject: Re: sodium street lamps (fwd)

At 09:58 1998-04-11 -0500, you wrote:
>Date: Sat, 11 Apr 1998 10:06:31
>From: "Richard W. Woodley" 
>To: guitar@autoroute.net
>Cc: rbeavers@llion.org
>Subject: Re: sodium street lamps
>
>       I suspect the culprit is not the EMFs but possibly the type of light
>emitted that is causing the problem. Usually EMFs from appliances or lights
>is strongetst nearest the source and would probably be quite low by the
>time it reached someone on the round. However I am forwarding your question
>to a group of experts for confirmation of this opinion.
>
>At 10:26 AM 4/10/98 -0700, you wrote:
>>Hi,
>>    Do you know the emf's emitted by the sodium street lights. I tend to
>>get headaches whenever I am around these lights. Have you heard of any
>>studies about the harmful effects of these lamps? Any help would be much
>>appreciated.

It is a big difference between low pressure and high pressure sodium lamps, 
the low pressure emits almost a monocromatic light at 590 nm while the
high pressure one emits a more broadband light with peaks at
20% at 500 nm, 60% at 570 nm, 50% at 590 nm, 65% at 610 nm, strenght relative
to
the high pressure lamps 100% at 590 nm.

It may well be the light itself that you feel, but that should be easy to 
test! Put something over your eyes that is completely opaque, just
closing your eyes will not do since the eyelids to let light through.
If you still feel the sensation it is probably not light (if you have
your clothes on and they cover the skin). PLEASE let us know after you
have tested this!

Since light installations of this kind requires lot of power and have 
multiple possible contact points with earth, ground currents may give
rise to high magnetic fields along the street, check this!

Clas Tegenfeldt       ,,,
                     (o o)
------------oOOO------(_)------OOOo-------------------
      BEMI - Better Electromagnetic Enviroment
BEMI                     Telephone/fax +46 (0)13-74075
Tornevalla Gamla Skola   Timezone      GMT-1
S-590 62 LINGHEM         E-mail        tegen@bemi.se
SWEDEN                   Web           http://www.bemi.se




Archive provided courtesy of WaveGuide, http://www.wave-guide.org
Reprinted with permission of Roy Beavers, http://www.feb.se/EMF-L/EMF-L.html