[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[OL-Forum] Digest Number 1463

------------------------ Yahoo! Groups Sponsor --------------------~--> 
Clean water saves lives.  Help make water safe for our children.
http://us.click.yahoo.com/CHhStB/VREMAA/E2hLAA/xYTolB/TM
--------------------------------------------------------------------~-> 

There are 6 messages in this issue.

Topics in this digest:

      1. Re: Newbie needs help!!
           From: kgfleming@att...
      2. RE: Newbie needs help!!
           From: "Nickas, George" <nickas@hanover...>
      3. Re: Fully shielded
           From: Steve Davis <w2sgd@juno...>
      4. Re: Re: Fully shielded
           From: "Leo Smith" <leo@smith...>
      5. Fully shielded - accessory houseside shields
           From: "David Penasa" <dpenasa@unm...>
      6. Re: Digest Number 1461
           From: "Barry Clark" <bajc@alphalink....au>


________________________________________________________________________
________________________________________________________________________

Message: 1         
   Date: Wed, 04 Jan 2006 11:24:27 +0000
   From: kgfleming@att...
Subject: Re: Newbie needs help!!

 -------------- Original message ----------------------
From: patric <patric@ghostriders...>
> kgfleming@att... wrote:
> 
> > the term shielded or fully shielded should be consistent with performance 
> outcome. That outcome should be observable by laymen including both those who 
> enforce the requirement and those who experience it. The only suggestion I have 
> is that some portion of the interior - reflective - side of any shield will be 
> visible from another property in most installations. 
> 
> That's easy to rectify with a swab of flat black paint along the 
> offending portion of the reflector, or additional house-side shielding.


Patric,

I agree that it's easy to rectify the glare (high reflectivity) with flat black paint but for the sake of a layman-friendly definition - and in recognition that flat black painted surfaces can look mighty bright when inches away from a 10k-50k light source - it's best to merely require no view to any part of the lamp. Such a definition would also inherently establish the 3-1 mounting height-to-property line minimum distance ratio. I'm not a fan of house side shields since they turn fco into fc and the view to the business end can be quite glaring.

Kevin 


________________________________________________________________________
________________________________________________________________________

Message: 2         
   Date: Wed, 4 Jan 2006 10:36:50 -0500
   From: "Nickas, George" <nickas@hanover...>
Subject: RE: Newbie needs help!!

In fact the 3:1 mounting height standard is generous enough to easily allow design of luminaires where the lamp is recessed into the housing far enough so there is no direct visibility.  One other thing, fco  should be a minimum standard in the sense that whether any lighting is necessary in the first place should be negotiable and challengeable.  This is an area of regulation that has been overlooked.   An awful lot of light pollution - easily most light pollution -- is the result of unproven and unchallenged assertions that the lighting is even necessary in the first place.  As far as I know none of our constitutional rights includes the right to "bear light"  Why do municipalities exercise so little control over the installation of lighting in the first instance.  If you can be told whether you can legally keep chickens or pigs in your backyard, why not lighting too?  gn





Patric,

I agree that it's easy to rectify the glare (high reflectivity) with flat black paint but for the sake of a layman-friendly definition - and in recognition that flat black painted surfaces can look mighty bright when inches away from a 10k-50k light source - it's best to merely require no view to any part of the lamp. Such a definition would also inherently establish the 3-1 mounting height-to-property line minimum distance ratio. I'm not a fan of house side shields since they turn fco into fc and the view to the business end can be quite glaring.

Kevin 



OutdoorLighting-Forum - "The largest uncensored and most active forum on light pollution." 
  
Inbox out of reach? Choose "no email" at http://groups.yahoo.com/group/OutdoorLighting-Forum/join?referer=1
and view posts in the archives, http://groups.yahoo.com/group/OutdoorLighting-Forum/messages 
To join: OutdoorLighting-Forum-subscribe@yahoogroups... 
Unsubscribe from any Yahoo list: listname-unsubscribe@yahoogroups...
==============================================================================
No endorsement by any organization of content posted to OLF is implied.
============================================================================== 
Yahoo! Groups Links



 





[Non-text portions of this message have been removed]



________________________________________________________________________
________________________________________________________________________

Message: 3         
   Date: Wed, 4 Jan 2006 10:23:26 -0500
   From: Steve Davis <w2sgd@juno...>
Subject: Re: Fully shielded

As for seeing the light source from a distance, the only way
to prevent that is by using a skirt with an internal or
external louver(s) unless you are actually above the fixture.
Such things do exist and are quite effective.

FCO and FS can be fitted with full shields similar to what is
done with SCO.  [unadvertised secret of the lighting industry]

HPS parking lot lights at a nursing home near me have
external louvers similar to what is found on fluorescent
tube lights in offices.  Very, very effective and installed
over 30 years ago!

Bottom line: Stop making excuses and solve the problem
you created! -sd



________________________________________________________________________
________________________________________________________________________

Message: 4         
   Date: Wed, 4 Jan 2006 11:54:08 -0500
   From: "Leo Smith" <leo@smith...>
Subject: Re: Re: Fully shielded

Steve...do you have any website addresses or specific product names for the 
skirts with the internal/external louvers?

Leo Smith

----- Original Message ----- 
From: "Steve Davis" <w2sgd@juno...>
To: <OutdoorLighting-Forum@yahoogroups...>
Sent: Wednesday, January 04, 2006 10:23 AM
Subject: [OL-Forum] Re: Fully shielded


> As for seeing the light source from a distance, the only way
> to prevent that is by using a skirt with an internal or
> external louver(s) unless you are actually above the fixture.
> Such things do exist and are quite effective.
>
> FCO and FS can be fitted with full shields similar to what is
> done with SCO.  [unadvertised secret of the lighting industry]
>
> HPS parking lot lights at a nursing home near me have
> external louvers similar to what is found on fluorescent
> tube lights in offices.  Very, very effective and installed
> over 30 years ago!
>
> Bottom line: Stop making excuses and solve the problem
> you created! -sd
>
>
>
>
> OutdoorLighting-Forum - "The largest uncensored and most active forum on 
> light pollution."
>
> Inbox out of reach? Choose "no email" at 
> http://groups.yahoo.com/group/OutdoorLighting-Forum/join?referer=1
> and view posts in the archives, 
> http://groups.yahoo.com/group/OutdoorLighting-Forum/messages
> To join: OutdoorLighting-Forum-subscribe@yahoogroups...
> Unsubscribe from any Yahoo list: listname-unsubscribe@yahoogroups...
> ==============================================================================
> No endorsement by any organization of content posted to OLF is implied.
> ==============================================================================
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.371 / Virus Database: 267.14.12/220 - Release Date: 1/3/2006
>
> 



________________________________________________________________________
________________________________________________________________________

Message: 5         
   Date: Wed, 4 Jan 2006 11:13:23 -0700
   From: "David Penasa" <dpenasa@unm...>
Subject: Fully shielded - accessory houseside shields

Just look for "houseside shield" accessory for a given product.

Here are a couple of example links for such shields:
GE Lighting (accessory dropped lens/flat lens cobrahead external streetlight
shields):

https://secure.ge-lightingsystems.com/gels01/productcentral/htmls/5_0_178_catalog_156.html

Gardco Gullwing - fully shielded, with optional internal houseside shield
http://www.sitelighting.com/pdf/19-Gardco-Individual/040-g_g13_cut.pdf
http://www.sitelighting.com/is_PDF/A3694201gw.pdf

David

>Steve...do you have any website addresses or specific product names for the
>skirts with the internal/external louvers?

Leo Smith

> As for seeing the light source from a distance, the only way
> to prevent that is by using a skirt with an internal or
> external louver(s) unless you are actually above the fixture.
> Such things do exist and are quite effective.
>
> FCO and FS can be fitted with full shields similar to what is
> done with SCO.  [unadvertised secret of the lighting industry]
>snip
>-sd



________________________________________________________________________
________________________________________________________________________

Message: 6         
   Date: Thu, 5 Jan 2006 22:19:28 +1100
   From: "Barry Clark" <bajc@alphalink....au>
Subject: Re: Digest Number 1461

Message: 3         
   Date: Mon, 2 Jan 2006 22:08:31 EST
   From: GailNY@aol...
Subject: Re: Digest Number 1454

Hi, Barry...

I'm wondering whether you were able to find out anything more about the 
research presented at this conference.

This seems to be the organization that sponsored it:

       http://www.israelrsa.org.il/

Perhaps if you contacted them, they could provide some further leads.

       Gail

Gail, 

Thanks. I did contact the UK head office of the international organisation and also one of the authors, Prof Abraham Haim.  I provided four key references on light at night and illness, and asked some questions.  Prof Haim sent a nice response, paraphrased and summarised here. 
  a.. Itai Kloog has been asked to send the title and English abstract of his MA thesis for use as a reference.
  b.. [In the graph on slide 14], breast cancer incidences are per 100 000 and the unit [of illuminance on the horizontal scale] is thought to be kilolux instead of microlux.
  c.. A manuscript has been offered for publication and the journal's reply is being awaited.
Presuming that the correction from micro to kilo is correct, this means the inhabitants don't grope about in pitch-black conditions at night but are subject to illumination that averages as much as two thousand times brighter than light from a full moon.  It would be interesting to see the crime rate data for the areas studied.

I'll post further details as they come to hand.

Barry

[Non-text portions of this message have been removed]



________________________________________________________________________
________________________________________________________________________


OutdoorLighting-Forum - "The largest uncensored and most active forum on light pollution." 
  
Inbox out of reach? Choose "no email" at http://groups.yahoo.com/group/OutdoorLighting-Forum/join?referer=1
and view posts in the archives, http://groups.yahoo.com/group/OutdoorLighting-Forum/messages 
To join: OutdoorLighting-Forum-subscribe@yahoogroups... 
Unsubscribe from any Yahoo list: listname-unsubscribe@yahoogroups...
==============================================================================
No endorsement by any organization of content posted to OLF is implied.
==============================================================================
------------------------------------------------------------------------
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/OutdoorLighting-Forum/

<*> To unsubscribe from this group, send an email to:
    OutdoorLighting-Forum-unsubscribe@yahoogroups...

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/
 
------------------------------------------------------------------------