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Re: Energy saving auto dimming street lights

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  Re: Energy saving auto dimming street lights andrew@cucumber.demon.co.uk (Andrew Gabriel) - 2018-01-03 17:47 +0000
    Re: Energy saving auto dimming street lights charles <charles@candehope.me.uk> - 2018-01-03 18:34 +0000
      Re: Energy saving auto dimming street lights Andy Burns <usenet@andyburns.uk> - 2018-01-04 12:23 +0000

#2783 — Re: Energy saving auto dimming street lights

In article <fb3odqFopnuU2@mid.individual.net>,
	Huge <Huge@nowhere.much.invalid> writes:
> On 2018-01-03, JAB <here@toadsfoot.net> wrote:
>>
>> Norway - At highway 155 in Nes i Hole, 220 radars have been installed
>> on light poles. They detect oncoming traffic and adjust the strength
>> of the light. By doing this, the 9 km/5.5 mi stretch saves a whopping
>> 2100 kWh per week. The extra investment will break even after just 4.5
>> years. 
>>
>> https://www.youtube.com/watch?v=mi8eE_NEfHM
> 
> In the UK they save even more money by simply not lighting the roads.

There has been a trend to switch off the lights on rural roads/motorways
outside busy periods.  In some cases, they have been permanently switched
off. Also, many have been changed to delay switch-on until much lower light
level than used to be the case.

In UK, many of the new LED streetlamps which are controlled by mesh
networks have their light level set remotely, and automatically adjusted
at different times of night. They can be adjusted for once-off events
too, when a council is prepared to pay extra to have them on brighter for
longer if there's a local event resulting lots of people around later.

I am not aware of occupancy sensing type controls in the UK, although
they are used in some parts of continental Europe, particularly on
pedestrian footpaths.

-- 
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

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#2784

In article <p2j4vm$893$2@dont-email.me>,
   Andrew Gabriel <andrew@cucumber.demon.co.uk> wrote:
> In article <fb3odqFopnuU2@mid.individual.net>,
> 	Huge <Huge@nowhere.much.invalid> writes:
> > On 2018-01-03, JAB <here@toadsfoot.net> wrote:
> >>
> >> Norway - At highway 155 in Nes i Hole, 220 radars have been installed
> >> on light poles. They detect oncoming traffic and adjust the strength
> >> of the light. By doing this, the 9 km/5.5 mi stretch saves a whopping
> >> 2100 kWh per week. The extra investment will break even after just 4.5
> >> years. 
> >>
> >> https://www.youtube.com/watch?v=mi8eE_NEfHM
> > 
> > In the UK they save even more money by simply not lighting the roads.

> There has been a trend to switch off the lights on rural roads/motorways
> outside busy periods.  In some cases, they have been permanently switched
> off. Also, many have been changed to delay switch-on until much lower light
> level than used to be the case.

> In UK, many of the new LED streetlamps which are controlled by mesh
> networks have their light level set remotely, and automatically adjusted
> at different times of night. They can be adjusted for once-off events
> too, when a council is prepared to pay extra to have them on brighter for
> longer if there's a local event resulting lots of people around later.

> I am not aware of occupancy sensing type controls in the UK, although
> they are used in some parts of continental Europe, particularly on
> pedestrian footpaths.

The LED lights at our railway station and a footpath outside seem to sense
the presence of a person; they get brighter when you approach.

-- 
from KT24 in Surrey, England

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#2785

charles wrote:

> The LED lights at our railway station and a footpath outside seem to sense
> the presence of a person; they get brighter when you approach.

The LED lighting in Sainsbury's do that (quite subtly) you have to go 
down an unpopular aisle when the shop is deserted to see it, also a 
local multi-storey has fluoro tubes that gently dim up and down as you 
walk past different sections.

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