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[DSLF] Digest Number 1874

There are 5 messages in this issue.

Topics in this digest:

      1. File - AccountReactivation.txt
           From: DarkSky-list
      2. File - SplitLink.txt
           From: DarkSky-list
      3. Czech Report 2005
           From: Jan Hollan <jhollan@amper....muni.cz>
      4. RE: Czech Report 2005
           From: "Friedel Pas" <friedel.pas@bvpartners...>
      5. Re: Czech Report 2005
           From: Jan Hollan <jhollan@amper....muni.cz>


Message: 1         
   Date: 1 Feb 2006 11:10:51 -0000
   From: DarkSky-list
Subject: File - AccountReactivation.txt

============== DarkSky List Forum Administrative Announcement ============
Subject:  Email Account Reactivation

to:  darksky-list-owner@yahoogroups...

Late in 2003 the Yahoo!Groups system instituted a new operating protocol 
that removes people from Yahoo!Groups Active List automatically if their 
email accounts bounce messages.  The system puts these accounts on a Bounce 
List.  When on the Bounce List the system will prevent you from receiving 
mail from ALL of the Yahoo!Groups that you belong to and can be a serious 
problem for people with active email accounts.

Don't miss the educational enrichment offered by the DarkSky List Forum and
other groups you might belong to.  Check your mail regularly and change your 
account preferences to receive Daily Digest or No Mail when you travel and 
cannot access your mail.  Be sure to do this with ALL Yahoo!Groups you belong 
to also.

We are aware some Anti-SPAM software blocks incoming messages with the word
Yahoo in the email header.  Request your system administrator to permit all 
mail with "@yahoogroups..." in the Return To field.  Some bouncing accounts 
have stated the following information in our members' bounce reports:

> "Remote host said: 550 5.7.1 your server is on the SpamCop Blocking List, 
> see: http://spamcop.net/bl.shtml
> For further information, see:
> http://www.oitc.com/EIMS/DNSblError.html?DNSbl=BL.SPAMCOP.NET [MAIL_FROM]"

Bouncing mail can occur for a number of reasons, but usually happens when
your inbox gets too full with unread messages and exceeds its quota. 
It can also happen during times when network traffic on your email service
provider is high and its resources are low.  If this happens, your email 
provider automatically sends back a special code to the Yahoo system (or to 
any other email originator) indicating a delivery problem occurred.

Your membership account may be deactivated by Yahoo if you belong to many 
other groups and if you do not check your messages often enough!  Statistics 
indicate most bounced messages DSLF Members experience come from other groups
90% of the time.  If you are a member of a busy group and do not open its mail 
as often as you should it helps to receive daily digests from those groups.  
This makes the system send only one message with all posts to you instead of 
10 or more messages each day.

If your account bounces a message that originates from Yahoo (i.e., any 
Yahoo!Group that you belong to) the system may place you into a Bounce List 
automatically!  Forum Administrators have no control or part in this so please 
don't blame us.  To date, over 70 people have been removed from the active
roster and placed on the Bounce List by this Yahoo policy in the DarkSky List 
Forum alone!  Administrators once had the ability to reactivate accounts manually but we no longer can with the new system.  Yahoo allows Moderators 
to either remove the names on the Bounce List (Yahoo recommends this) or send 
Email Account Reactivation notices to the bouncing members.  At DSLF, we send 
numerous Email Account Reactivation notices before removing a member.


If you receive a message requesting Email Account Reactivation in its 
subject line please do not delete it thinking it is Spam or a scam!  You 
MUST reply to the reactivation request message and send it back to the 
system indicating your email account is valid and active.  Several hours 
after your reply your membership will become active again, however, you may 
miss a few messages in the mean time.

The Account Reactivation message will include instructions for a unique
URL you can visit to reactivate your account.  This is the fastest way to 
reactivate your account.  Sometimes sending the message back takes Yahoo 
several hours or even several days to go into effect, so visiting the URL 
in the message is the best option.  That URL disappears after it is visited 
and will not work for any other accounts.

Please check your inbox frequently to assure an account deactivation 
does not happen to you.  

TO YOU.  It is your responsibility to keep your account active, so please 
check your inbox frequently.  If you will be away from your email for an 
extended period of time be sure to set your account to receive daily digest 
so you don't miss any messages.  

Visit the following URL to modify your email account options...


Please review the Forum Rules to assure you conform with the requirements 
for participation.  They are always available online at:


Thanks for your consideration and we appreciate your cooperation.  Check 
your mail from all Yahoo!Groups often to keep from being bounced!  Save
the good messages that may be helpful to you in the future because the
online archives are not available.  This is a security measure to prevent
Spam and preserve everyone's current efforts striving for light pollution

Best regards,

Cliff Haas
Founder DarkSky List Forum


Message: 2         
   Date: 1 Feb 2006 11:10:51 -0000
   From: DarkSky-list
Subject: File - SplitLink.txt

Forum Productivity Hint

This is an automated message so please do not respond in
the general messages.  Any questions may be directed to
DSLF Moderators at:


Productivity Hint:

When long Internet links split into two or more lines, a
back slash (\) character may be appended to the link!
This anomaly does not occur in all email programs but does
happen with some so please be aware of it.

links to your web browsers because it does not belong there
and will often result with a *404 File Not Found* error.  

With links that split you must post each line to your browser
address bar separately so the cumulative URL is included.  Be
sure the first part that has already been pasted is not highlighted
in your address bar when the next part is pasted or it will cause
it to be erased when you paste the next part of the link.

Also, when presenting URL links in messages please include
the [http://] portion of the address.  This will cause the
YahooGroups system to send links to recepients in hyperlinked
fashion.  Some email programs may be able to append the http://
to incoming messages but many others do not have that ability.

Sorry for any inconvenience this feature has caused.  There is
nothing that Forum management can do about this problem with the
available system settings from a sysop standpoint.



To share news of an article or a web site please post only the 
URL (Internet address) where the information can be located on 
the Web.  You are encouraged to provide a short synopsis of 
what the information contains, but please do so IN YOUR OWN WORDS.

Please always trim away everything except the most pertinant content
from any past message you are replying to.  People do not appreciate
reading the same information over and over again and this practice
eats up everyone's disk space for those who save messages locally.  
Reposting redundant information also slows down the mail distribution 
system and some people must pay for every byte of information they 
receive -- even email messages.  We encourage you to save all messages 
from DSLF on your local machine for future reference.


Review the Forum Rules from time to time to be sure you understand
what is required for you to remain in compliance.  The Forum Rules
are always available for review at the following URL:



Thanks for your participation in the DarkSky List Forum and your
cooperation conforming to the terms you agreed to abide by when
becoming a member is greatly appreciated.  The Forum Rules help
to provide a more professional interface that allows everyone to
learn more and get an enriching experience from all of the wisdom
each of us has to offer.  We want to hear about your successes, 
failures, and potential efforts to help reform obtrusive outdoor 
lighting practices.

Best regards,
DarkSky List Forum Owner


Message: 3         
   Date: Mon, 30 Jan 2006 18:52:04 +0100 (CET)
   From: Jan Hollan <jhollan@amper....muni.cz>
Subject: Czech Report 2005


here is my report for 2004 and 2005:

You should be able to input html version even to M$word, e.g. by writing a
  winword 2005report.html

I didn't read it after writing it, just checked the URLs. It's my bad
English, but hopefully can be understood. In fact, I devoted myself to get
the contents of some directories (like that with London photometry) into
a usable shape, so that the Report might become useful for the readers.
Writing the Report had been a good opportunity go finish some old tasks.

It's an open document (if I will edit it, I'll change the date and put the
today's text in an ``old'' subdirectory, so this version will remain the
official text submitted before the end of January), I'll correct it if
errors will be found.



Message: 4         
   Date: Mon, 30 Jan 2006 23:56:11 +0100
   From: "Friedel Pas" <friedel.pas@bvpartners...>
Subject: RE: Czech Report 2005

Greenhouse ligthing is also a big problem in our regions. More and more
greenhouses are lighted. Not only for have more tomatoes productions,
but also for other vegetables or for flowers. Sometimes to have some
specific flowers just at a specific date. It is increasing in Flanders.
In the Netherlands the problem is even more worst. They estimate that
60% of the light going the sky is produced by greenhouses in the
Netherlands. Last estimations of Flanders is about 40% but I'm not sure
this last estimation was done in the right way. We still have to
evaluate that calculation method but I think it has to be less then the

So it is an important issue. With the lighting of one greenhouse you can
illuminate a big number of kilometers of high way!

Their exists sollutions for that by a kind of screens. The most used
screens are energy screens with reducing lighting outside the greenhouse
with 85%. This type of screens reduce the energy cost for the warming of
the greenhouse also with 10% to 40%. They can be used in combination
with screens for avoiding light pollution that is blocking more then 95%
of the lighting. This has not mutch energy benefits. I did not know
about calculations about reduction in wattages by reflecting the light
back to the greenhouse, but it seems not to be the big difference in the
cost. In Flanders the Flemish government pay back 40% of the investment
cost of the screens. This in the view of promoting energy saving
methods. In the Netherlands they are not allowed to use the lighting
between 20.00 ours and midnight to reduce nuicance for the environment.
(they think that it not matter after midnight because poeple has to
sleep then already). They are also obligated to use screens at the sides
of the greenhouse, not in the direction of the sky.

Their are also problems with this method. It is not working for all kind
of plants in the greenhouse. Using screens can make it for some of them
very difficult to regulate the climate in the greenhouse in the correct
way. Currently in the Netherlands and some small in Flanders also are
studies running to solv the problem. We did also some sugestions that
are currently in evaluation. In the Netherlands their is a goal signed
by the environmental associations and greenhouse industry to try to
forseen every where screens for reducing lighting outside the greenhouse
with 95% to 2008 depending from the results of the studies to find
sollutions for regulating the climate in a proper way.

In Flanders is done a study of best available practices for reducing
environmental impact of greenhouses. Also the lighting stuff is covered
their. The sollution of the screens is also studied. In such a study is
also looked to the economic posibility of the method. Obstructing light
from the greenhouses by screens with 95% was defined as economic not
possible for a industry currently have a lot of problems (high energy
cost, low prices for the products...). In combination with the energy
screens also obstructing lighting for 85% together with the 95% screens,
and the subsidizing for the investment of the government, the
installation is a good sollution for a lot of applications and also
economical possible.
Their was done a strong recomandation to the government to promote and
eventualy obligate the use of this combination on places where technical

On exibitions we did about light pollution we has also talks with some
greenhouse farmers. Some of them installed the screens. The reasons why
they installed were energy savings and sometimes reducing light
pollution. A few specified also an other reason. Against thefs. The
lighting installations is offen stolen. Mostly by criminals setting up
canabis plantages. Reducing the number of lighting going outside the
greenhouse has also a lower stolen instalations as a result because the
thefs not so easy notify the installations then when not using the


Friedel Pas
Preventie Lichthinder vzw
BTW BE-869.570.554
Rek.nr. 733-0234822-15
Gallifortlei 114
2100 Deurne
Tel.: +32-474-50.17.95
e-mail: friedel.pas@lichthinder...
website: http://www.preventielichthinder.be


-----Original Message-----
From: DarkSky-list@yahoogroups... [mailto:DarkSky-list@yahoogroups...]
On Behalf Of Jim & Mary Ronback

Your report is a very valuable source of ammunition to combat light 
pollution. Thank you!


Message: 5         
   Date: Tue, 31 Jan 2006 17:51:59 +0100 (CET)
   From: Jan Hollan <jhollan@amper....muni.cz>
Subject: Re: Czech Report 2005

> On page 5 sec 3.2 National Park at Night Research
> 4th paragraph - Delete "milli" in all instances of "millicandela" and
> "millinit" in order to be consistent with the comparison to twice the
> sky luminance of 0.5 cd/m^2.
> page 6 sec 3.3 Tolerable ski slope lighting
> 3rd paragraph - Replace all instances "luminance" with "illuminance" to
> be consistent with the first sentence,  assuming that lux units are only
> intended to be associated with illuminance.

Jim, thanks for alerting me.

The first problem solution was easy, just correcting the first value, it
should read 0.5 mcd/m2. Milli- is OK further on.

As for the second confusion, I tried to clarify it by adding the
illuminance/luminance conversion to the text. Searching for realistic
conversion for roads, I've arrived at the Leon 2005 meeting papers,
www.ceisp.com/simposium/sleon05.htm. These cover many topics, one of them
studied an effect of blue evening imissions to the eyes of old people (and
demonstrated a nice humanisation of their environment achieved by replacing
night fluorescent lighting with an amber LED one, sensor-controlled) --
just search ``sleep'' within the page.

The updated report is again http://amper.ped.muni.cz/light/ida/ and the
outdated one is within a subdirectory (Barry Clark was so kind to reveal
me the truth about nits today, just after that I looked into a dictionary,
there is a footnote on that now in the Report, I won't insist on using
this designation in English texts written for native readers any more).

> If  lovers of the dark night sky want to preserve it, then they should
> start defending it, by taking measurements of the horizon as well as the
> sky overhead.. All these measurements are needed to show how the beauty
> of the night is being gradually lost to our future generations, if no
> action is taken. There is a database set up by Unihedron.com to record
> results from around the world. It should be augmented with sky pollution
> measurements as well. Eventually I would like to see the lighting
> regulations / ordinances / bylaws all around Canada and elsewhere, add
> measurable limits on obtrusive light sources at a distance as well. Any
> suggestions?

Any raw-format-capable camera can do the job too, with current versions
of dcraw and my raw2lum. In fact, I have a lot of further images to be
processed, for some I have simultaneous SQM zenith readings. I did not
mention the lots of existing unprocessed/unpublished data in the
report... nothing inspiring to the readers.

As for the legislation, a national level, or the highest existing one, as
with other main kinds of pollution, toxic or climate-relevant, is the
proper basic one, IMHO.



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