Thank you all very much for your helpful responses, it's interesting
looking at this from the point of view of universal/inclusive
design/accessibility, environmental factors, health and safety, and
security.
Taku, I will be very interested to see further research in this area as it
progresses.
Jane, thank you, CIBSE have some nice factsheets
(http://www.cibse.org/index.cfm?go=page.view&item=238 and
http://www.cibse.org/index.cfm?go=page.view&item=369) on lighting which I
have forwarded on.
Kindest regards and thanks again,
Antoinette
Dr Antoinette Fennell
Project Manager
Centre for Excellence in Universal Design (CEUD)
National Disability Authority
25 Clyde Rd
Dublin 4
Tel: +353 (0)1 6080 478
Fax: +353 (0)1 6609 935
Web address www.universaldesign.ie
CEUD Vision: “The Centre is dedicated to the principle of universal access
for people in Ireland to participate in a society that takes account of
human difference, enabling everyone to interact with their environment to
the best of their ability”
"Access and the City- universally designed communications for ease of
visiting and effective living in cities and towns"
20 November 2008
more details on www.universaldesign.ie
in conjunction with Dublin City Council and the European Observatory Towns
and Cities for All
Terence Love
<[log in to unmask]
AU> To
Sent by: [log in to unmask]
Accessibuilt list cc
<ACCESSIBUILT@JIS
CMAIL.AC.UK> Subject
Re: Sodium Lighting
11/11/2008 13:52
Please respond to
Accessibuilt list
<ACCESSIBUILT@JIS
CMAIL.AC.UK>
Dear Elizabeth,
I seem to remember that the reason for the sodium yellow lighting is that
in reasonable light levels people's eyes are more sensitive to the saturn
yellow colour (hence is possible to reduce lumens overall and reduce
energy and carbon footprint).
So one can see much better in yellow light for a given light level if light
levels are reasonable.
For very low light levels, however, eye sensitivity is better for
blue-green-white.
See, for example,
http://www.venturelighting.com/TechCenter/LowLightLevels.html
I guess that how this relates to partial sightedness will depend on the
physiological reasons for the partial-sightedness. It suggests that any
proposed lighting design would likely require trials for different groups
of partially sighted people.
Best wishes
Terry
From: Accessibuilt list [mailto:[log in to unmask]] On Behalf Of
Elizabeth Michel
Sent: Tuesday, 11 November 2008 10:28 PM
To: [log in to unmask]
Subject: Re: Sodium Lighting
Hi
I have expenrienced that blue lighting in Littlehampton and makes
everything white glow in the dark and it's a very eerie feeling. Now I know
what it's for.
The reason for using sodium orange light if I can remember rightly (and I
may be wrong) is one of economy, back in the days when the bulbs using less
energy were not even thought off and the need to have some lighting, but
not very strong.
Elizabeth Michel
> Date: Mon, 10 Nov 2008 16:23:18 +0000
> From: [log in to unmask]
> Subject: Re: [ACCESSIBUILT] Sodium Lighting
> To: [log in to unmask]
>
> Hello Antoinette / Helen,
>
> I think JMU Access Partnership (aka RNIB Access Consultancy Services) may
have guidelines on lighting. I'm not sure if they follow formalised
guidelines but they definitely have a viewpoint. Here's their web address:
http://www.jmuaccess.org.uk/8.asp
>
> I put a letter from JMU in Access Journal a while ago - they actively
advise against blue lighting in public accessible toilets, which are often
bluelit to discourage injecting drug users. The blue light makes it
difficult for partially sighted people and does not discourage determined
drug users. I have no idea if the same idea was behind bluelighting the
entire street in Glasgow.
>
> Thanks,
> Henry
>
>
>
> ---
> Henry French
> Assistant Magazine Editor
> RNIB
> 105 Judd Street
> London
> WC1H 9NE
> 020 7391 3290
>
>
>
> -----Original Message-----
> From: Accessibuilt list [mailto:[log in to unmask]] On Behalf Of
Bryant, Helen
> Sent: 10 November 2008 16:11
> To: [log in to unmask]
> Subject: Re: Sodium Lighting
>
> Hello,
>
> I can tell you from experience that sodium light can be very unhelpful,
particularly when, as you cite, reading timetables. Often these are too
high up anyway, as I'm a wheelchair user, and the yellow light certainly
doesn't make it clearer.
>
> Another consideration is that this type of light changes colour values;
red all but disappears under such conditions. This makes it all the more
puzzling to me that the majority of streetlights are like this.
>
> Some time ago (possibly on another list) there was a discussion about a
place called Buchanan Street in Glasgow, which has blue lighting. I'm sure
that this, too can cause problems for people with visual impairments but
I've not read of any being reported;
> http://www.pps.org/great_public_spaces/one?public_place_id=755#
>
> Cheers,
>
> Helen
>
>
>
>
> -----Original Message-----
> From: Antoinette M. Fennell [mailto:[log in to unmask]]
> Sent: 10 November 2008 15:55
> To: [log in to unmask]
> Subject: Sodium Lighting
>
>
> Hello,
>
> I received a query on street lighting - specifically Sodium lighting and
> the problems that this lighting poses for people with regard to visual
> contrast (visibility of kerb edges, reading timetables in low lighting
> etc.)
>
> Is anyone aware of guidance or recommendations on street lighting? Either
> from an accessibility or a security point of view.
>
> Kindest regards,
>
> Antoinette
>
>
>
> Dr Antoinette Fennell
> Project Manager
> Centre for Excellence in Universal Design (CEUD)
> National Disability Authority
> 25 Clyde Rd
> Dublin 4
>
> Tel: +353 (0)1 6080 478
> Fax: +353 (0)1 6609 935
> Web address www.universaldesign.ie
>
> CEUD Vision: "The Centre is dedicated to the principle of universal
access
> for people in Ireland to participate in a society that takes account of
> human difference, enabling everyone to interact with their environment to
> the best of their ability"
>
> "Access and the City- universally designed communications for ease of
> visiting and effective living in cities and towns"
> 20 November 2008
> more details on www.universaldesign.ie
> in conjunction with Dublin City Council and the European Observatory
Towns
> and Cities for All
>
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