On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

On Fri, 29 Jul 2016 19:37:09 -0000 (UTC), Chris
wrote:

On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

To discourage intravenous drug use.


--

Graham.

%Profound_observation%

On 29 Jul 2016 20:57:38 GMT, Huge wrote:

On 2016-07-29, Graham wrote:
On Fri, 29 Jul 2016 19:37:09 -0000 (UTC), Chris
wrote:

On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

To discourage intravenous drug use.

They're not uncommon in public lavatories, for the same reason.

That tends to be a fairly dim blue light rather than super-bright blue
LEDs.

On Fri, 29 Jul 2016 22:09:37 +0100, mcp wrote:

That tends to be a fairly dim blue light rather than super-bright blue
LEDs.

Yes, and they're somewhat UV to make white powder glow. Super-bright
blue, though? No idea.

Who knows but they annoy the heck out of people with poor vision making
people dazzled and making the effects of cataracts far worse by creating
blooming effects.
My guess is that when coming down they help with seeing the edges of steps
in 3D so to speak but at the expense of making going the other way far more
annoying. A classic case of helpful ideas that have not been completely
thought through.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Chris" wrote in message
...
On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

On 29/07/16 20:37, Chris wrote:
On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?


Preventing Suicides?

Seems the Blue LED Floodlights are meant to have a calming effect.

http://www.railway-technology.com/fe...tions-4627355/

--
Adrian C

On Saturday, 30 July 2016 07:23:05 UTC+1, Brian Gaff wrote:
"Chris" wrote in message
...
On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

Who knows but they annoy the heck out of people with poor vision making
people dazzled and making the effects of cataracts far worse by creating
blooming effects.
My guess is that when coming down they help with seeing the edges of steps
in 3D so to speak but at the expense of making going the other way far more
annoying. A classic case of helpful ideas that have not been completely
thought through.
Brian

I suspect their only real purpose is to extract money from the companies that buy them. To claim they stop drug use & prevent suicides seems ridiculous.


NT

/


Designers increasingly shine lights at the observer. Even theatre often has
light sources too visible. The basics of needing the light to hit the
subject so that the observer can see the reflected image seems to have got
lost somewhere.
And don't get me started on peoples. exterior PIR Floodlights. A new
development near me seems to have them all neatly pointing straight
outwards such that 50% of the light is wasted into the sky.

On Sat, 30 Jul 2016 08:46:04 +0100, Adrian Caspersz wrote:

Preventing Suicides?

You're right! Can't see how the heck it's supposed to work, though. :-/

Seems the Blue LED Floodlights are meant to have a calming effect.

http://www.railway-technology.com/fe...ng-suicide-at-
railway-stations-4627355/

"Minimise Energy, a company specialising in the production of blue LED
floodlights for public spaces, describe the effect in a press release:
"Research has shown that blue light can induce calm, and as a colour
often associated with authority, particularly the police, blue light in
public places is different enough from the norm to encourage people to
rethink before committing unwanted behaviour.

"The company distributed their blue lights to Network Rail and have been
following the trials intently. According to head of UK sales at Minimise
Energy Sam Stageman, "the initial trial has given satisfactory results to
promote further opportunities so I think it is very client-dependent on
how far they want to roll it out to a major premise or areas of
particular concern. Following the success of that, further product is
being provided for additional stations."

Sounds like a load of old ********.

Graham. wrote:
On Fri, 29 Jul 2016 19:37:09 -0000 (UTC), Chris
wrote:

On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

To discourage intravenous drug use.


How is that meant to work please. No personal experience in such matters....

Bob Minchin wrote:
Graham. wrote:

To discourage intravenous drug use.

How is that meant to work please. No personal experience in such
matters....

If the area's flooded with blue light it's meant to stop you seeing the
veins to stab 'em, IIRC. Don't see it being useful in more public areas
where there's other light sources tho.

--
Scott

Where are we going and why am I in this handbasket?

Bob Minchin wrote:
Graham. wrote:
On Fri, 29 Jul 2016 19:37:09 -0000 (UTC), Chris
wrote:

On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

To discourage intravenous drug use.


How is that meant to work please. No personal experience in such matters....


Blue light makes it much harder to seen veins beneath the skin.

Tim

--
Trolls AND TROLL FEEDERS all go in my kill file

Yes I don't see the connection with either activity.
I wonder if there was a job lot sculking around in a warehouse and somebody
creatively sold them to the station folks.
I had myself wondered about them as any bright blue or uv lights make my
visual field flash and spin, which if anything would make me more likely to
fall down the stairs.

There are some also in a nearby leisure centre as well, over the main in
door. Many get so dazzled they then come a cropper over a very badly placed
A board outside proclaming how good their cafe is I gather.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
wrote in message
...
On Saturday, 30 July 2016 07:23:05 UTC+1, Brian Gaff wrote:
"Chris" wrote in message
...
On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations
now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

Who knows but they annoy the heck out of people with poor vision making
people dazzled and making the effects of cataracts far worse by creating
blooming effects.
My guess is that when coming down they help with seeing the edges of
steps
in 3D so to speak but at the expense of making going the other way far
more
annoying. A classic case of helpful ideas that have not been completely
thought through.
Brian

I suspect their only real purpose is to extract money from the companies
that buy them. To claim they stop drug use & prevent suicides seems
ridiculous.


NT

Utter crap.
Sorry but I've not found anyone with a good word to say about them. They
are too bright. If they were no so bright I might believe it.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Adrian Caspersz" wrote in message
...
On 29/07/16 20:37, Chris wrote:
On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?


Preventing Suicides?

Seems the Blue LED Floodlights are meant to have a calming effect.

http://www.railway-technology.com/fe...tions-4627355/

--
Adrian C

Yes I suspect people are so busy trying to see through the dazzle they have
no time to get annoyed or commit suicide, instead every fall is an
unfortunate accident instead.

I was always told that warm colours induced calm.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Chris" wrote in message
...
On Sat, 30 Jul 2016 08:46:04 +0100, Adrian Caspersz wrote:

Preventing Suicides?

You're right! Can't see how the heck it's supposed to work, though. :-/

Seems the Blue LED Floodlights are meant to have a calming effect.

http://www.railway-technology.com/fe...ng-suicide-at-
railway-stations-4627355/

"Minimise Energy, a company specialising in the production of blue LED
floodlights for public spaces, describe the effect in a press release:
"Research has shown that blue light can induce calm, and as a colour
often associated with authority, particularly the police, blue light in
public places is different enough from the norm to encourage people to
rethink before committing unwanted behaviour.

"The company distributed their blue lights to Network Rail and have been
following the trials intently. According to head of UK sales at Minimise
Energy Sam Stageman, "the initial trial has given satisfactory results to
promote further opportunities so I think it is very client-dependent on
how far they want to roll it out to a major premise or areas of
particular concern. Following the success of that, further product is
being provided for additional stations."

Sounds like a load of old ********.

Tim+ wrote:
Bob Minchin wrote:
Graham. wrote:
On Fri, 29 Jul 2016 19:37:09 -0000 (UTC), Chris
wrote:

On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

To discourage intravenous drug use.


How is that meant to work please. No personal experience in such matters....


Blue light makes it much harder to seen veins beneath the skin.

Tim

OK thanks

On 30/07/2016 11:02, Brian Gaff wrote:


I was always told that warm colours induced calm.
Brian


Only by those who only sold light bulbs of that colour temperature


--
mailto: news {at} admac {dot] myzen {dot} co {dot} uk

Chris Wrote in message:
On Sat, 30 Jul 2016 08:46:04 +0100, Adrian Caspersz wrote:

Preventing Suicides?

You're right! Can't see how the heck it's supposed to work, though. :-/

Seems the Blue LED Floodlights are meant to have a calming effect.

http://www.railway-technology.com/fe...ng-suicide-at-
railway-stations-4627355/

"Minimise Energy, a company specialising in the production of blue LED
floodlights for public spaces, describe the effect in a press release:
"Research has shown that blue light can induce calm, and as a colour
often associated with authority, particularly the police, blue light in
public places is different enough from the norm to encourage people to
rethink before committing unwanted behaviour.

"The company distributed their blue lights to Network Rail and have been
following the trials intently. According to head of UK sales at Minimise
Energy Sam Stageman, "the initial trial has given satisfactory results to
promote further opportunities so I think it is very client-dependent on
how far they want to roll it out to a major premise or areas of
particular concern. Following the success of that, further product is
being provided for additional stations."

Sounds like a load of old ********.



It's got premise used as the singular of premises.
--

%Profound_observation%

On Sat, 30 Jul 2016 10:58:59 +0100, Brian Gaff wrote:

Utter crap.
Sorry but I've not found anyone with a good word to say about them.
They
are too bright. If they were no so bright I might believe it.
Brian

I agree. They cannot possibly by any stretch of the imagination be
described as "calming." There's something else going on here.

"Chris" wrote in message ...

On Sat, 30 Jul 2016 10:58:59 +0100, Brian Gaff wrote:

Utter crap.
Sorry but I've not found anyone with a good word to say about them.
They
are too bright. If they were no so bright I might believe it.
Brian

I agree. They cannot possibly by any stretch of the imagination be
described as "calming." There's something else going on here.

Facial recognition closely coupled with ANPR and a multitude of other
intelligence gathering devices which are keeping you and your loved ones
safe and sound.
Happy now?

On 7/30/2016 7:22 AM, Brian Gaff wrote:
Who knows but they annoy the heck out of people with poor vision making
people dazzled and making the effects of cataracts far worse by creating
blooming effects.

Treated cataracts? Or untreated?



My guess is that when coming down they help with seeing the edges of steps
in 3D so to speak but at the expense of making going the other way far more
annoying.

The biggest danger is coming downstairs. If you miss a step going up,
you don't fall far.

"Graham." wrote in message
...
On Fri, 29 Jul 2016 19:37:09 -0000 (UTC), Chris
wrote:

On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

To discourage intravenous drug use.

Discourage or displace?



--
Adam

In article ,
Bob Minchin wrote:
Graham. wrote:
On Fri, 29 Jul 2016 19:37:09 -0000 (UTC), Chris
wrote:

On a recent trip back to the UK I noticed - whilst travelling mostly
by rail - that at the landings of flights of steps at very many
stations now there are overhead panels of super-bright blue LEDs
tilted downwards towards passengers approaching the stairs. These
panels are *extremely* bright and quite painful to look directly at,
even in daylight. They appear to be left on day and night. Does any
knowledgeable person know what function they're supposed to perform?

To discourage intravenous drug use.


How is that meant to work please. No personal experience in such
matters....

I must lead a sheltered life. I've never seen anyone injecting themselves
with illegal drugs in a tube station. Far more likely in a toilet cubical.

--
*With her marriage she got a new name and a dress.*

Dave Plowman London SW
To e-mail, change noise into sound.

On 29/07/2016 20:37, Chris wrote:
On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

Well the railway companies rob you blind, now they want to dazzle you
blind as well.

Bill

"Bill Wright" wrote in message
...
On 29/07/2016 20:37, Chris wrote:
On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

Well the railway companies rob you blind, now they want to dazzle you
blind as well.

Not a problem for those of us that do not use a train.


--
Adam

On Friday, 29 July 2016 23:57:05 UTC+1, Cursitor Doom wrote:
On Fri, 29 Jul 2016 22:09:37 +0100, mcp wrote:

That tends to be a fairly dim blue light rather than super-bright blue
LEDs.

Yes, and they're somewhat UV to make white powder glow. Super-bright
blue, though? No idea.

Maybe it is to help the baggage handlers in Gate 3 lose your bags more easily?
How much would it cost to switch them off is someone fell over?

"Richard" wrote in message
...
"Chris" wrote in message ...

On Sat, 30 Jul 2016 10:58:59 +0100, Brian Gaff wrote:

Utter crap.
Sorry but I've not found anyone with a good word to say about them.
They
are too bright. If they were no so bright I might believe it.
Brian

I agree. They cannot possibly by any stretch of the imagination be
described as "calming." There's something else going on here.

Facial recognition closely coupled with ANPR and a multitude of other
intelligence gathering devices which are keeping you and your loved ones
safe and sound.

They clearly have something rather annoying there so they
can see who reacts to that and they are clearly those who
need to be carefully watched in case they get annoyed
about something else and blow themselves to bits etc.

Happy now?

Delighted.

ARW wrote
Graham. wrote
Chris wrote

On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.

Does any knowledgeable person know what function they're supposed to
perform?

To discourage intravenous drug use.

Discourage or displace?

They arent doing IV injections on the stairs there even without those lights
there.

"Rod Speed" wrote in message
...
ARW wrote
Graham. wrote
Chris wrote

On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations
now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.

Does any knowledgeable person know what function they're supposed to
perform?

To discourage intravenous drug use.

Discourage or displace?

They arent doing IV injections on the stairs there even without those
lights there.

Wouldn't a decent LED or tungsten head-torch, maybe with a red filter to
increase the contrast of blue veins against skin, defeat all but the
brightest blue lights? Anyway, the blue lights I've seen (fluorescents in
buses and public loos) are very dim.

On Sat, 30 Jul 2016 10:34:55 +0100, Bob Minchin wrote:

Graham. wrote:
On Fri, 29 Jul 2016 19:37:09 -0000 (UTC), Chris
wrote:

On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now
there are overhead panels of super-bright blue LEDs tilted downwards
towards passengers approaching the stairs. These panels are *extremely*
bright and quite painful to look directly at, even in daylight. They
appear to be left on day and night.
Does any knowledgeable person know what function they're supposed to
perform?

To discourage intravenous drug use.


How is that meant to work please. No personal experience in such matters....

They shouldn't be stopping people from doing what they like to their own bodies.

--
Before Murphy's Law, there was IPOIO, the innate perversity of inanimate objects. Inanimate objects move when nobody is looking.

All they care about is nobody can say "poorly lit area, sue them".


On Sat, 30 Jul 2016 07:22:57 +0100, Brian Gaff wrote:

Who knows but they annoy the heck out of people with poor vision making
people dazzled and making the effects of cataracts far worse by creating
blooming effects.
My guess is that when coming down they help with seeing the edges of steps
in 3D so to speak but at the expense of making going the other way far more
annoying. A classic case of helpful ideas that have not been completely
thought through.
Brian



--
Q. What's a Catholic priest and a pint of Guinness got in common?
A. A black coat, white collar and you've got to watch your arse if you get a dodgy one!

On Sat, 30 Jul 2016 14:29:47 +0100, Graham. wrote:

Chris Wrote in message:
On Sat, 30 Jul 2016 08:46:04 +0100, Adrian Caspersz wrote:

Preventing Suicides?

You're right! Can't see how the heck it's supposed to work, though. :-/

Seems the Blue LED Floodlights are meant to have a calming effect.

http://www.railway-technology.com/fe...ng-suicide-at-
railway-stations-4627355/

"Minimise Energy, a company specialising in the production of blue LED
floodlights for public spaces, describe the effect in a press release:
"Research has shown that blue light can induce calm, and as a colour
often associated with authority, particularly the police, blue light in
public places is different enough from the norm to encourage people to
rethink before committing unwanted behaviour.

"The company distributed their blue lights to Network Rail and have been
following the trials intently. According to head of UK sales at Minimise
Energy Sam Stageman, "the initial trial has given satisfactory results to
promote further opportunities so I think it is very client-dependent on
how far they want to roll it out to a major premise or areas of
particular concern. Following the success of that, further product is
being provided for additional stations."

Sounds like a load of old ********.



It's got premise used as the singular of premises.

It should be.

--
What do you call a dwarf who throws the discus?
A compact disc player.

Nothing is as bright as a daytime running light.


On Sat, 30 Jul 2016 10:58:59 +0100, Brian Gaff wrote:

Utter crap.
Sorry but I've not found anyone with a good word to say about them. They
are too bright. If they were no so bright I might believe it.
Brian



--
If you are going to try cross-country skiing, start with a small country.

"James Wilkinson" wrote in message
news
Nothing is as bright as a daytime running light.

If a DRL wasn't bright, it wouldn't be worth having - in order for a DRL to
stand out from the surroundings, it needs to be brighter than normal
sunlight or bright cloudy light reflected off something white - the purpose
of DRLs is to be seen.

Hopefully they are no brighter than sunlight off a mirrored surface (eg
paintwork, chromework, windscreen) and hopefully the intensity reduces as
the level of daylight does.

Yes, DRLs are fairly bright but I don't find them dazzlingly so, mainly
because they are at the front of cars and therefore are only seen by
oncoming traffic for a short time before the car has passed you. And I don't
notice them being more dazzling on a dull day or at dusk than on a bright
sunny day, which makes me think that there's some adjustment for ambient
light level.

What I *do* find dazzling are rear fog lights when there's no fog, or brake
lights when the driver in front of you in a traffic jam sits stationary, a
few feet ahead of you, with his brake lights on instead of using his
handbrake, or park gear if he's got an auto. I find bright, highly saturated
(monochromatic) lights more distracting and inclined to leave after-images
on my retinas than highly unsaturated white lights.

But we're all different.

NY wrote
Rod Speed wrote
ARW wrote
Graham. wrote
Chris wrote

On a recent trip back to the UK I noticed - whilst travelling mostly
by rail - that at the landings of flights of steps at very many
stations now there are overhead panels of super-bright blue LEDs
tilted downwards towards passengers approaching the stairs. These
panels are *extremely* bright and quite painful to look directly at,
even in daylight. They appear to be left on day and night.

Does any knowledgeable person know what function they're supposed to
perform?

To discourage intravenous drug use.

Discourage or displace?

They arent doing IV injections on the stairs there even without those
lights there.

Wouldn't a decent LED or tungsten head-torch, maybe with a red filter to
increase the contrast of blue veins against skin, defeat all but the
brightest blue lights?

Sure, but would clearly make it more obvious what you are
doing if you are stupid enough to do it on the stairs in public.

Anyway, the blue lights I've seen (fluorescents in buses and public loos)
are very dim.

Can't say I have seen any at all, but then I'm not there.

James Wilkinson wrote

Nothing is as bright as a daytime running light.

Searchlights are much brighter.

On Sat, 30 Jul 2016 10:58:59 +0100, Brian Gaff
wrote:

Utter crap.
Sorry but I've not found anyone with a good word to say about them. They
are too bright. If they were no so bright I might believe it.

On Sat, 30 Jul 2016 20:15:16 +0100, NY wrote:

"James Wilkinson" wrote in message
news
Nothing is as bright as a daytime running light.

If a DRL wasn't bright, it wouldn't be worth having - in order for a DRL to
stand out from the surroundings, it needs to be brighter than normal
sunlight or bright cloudy light reflected off something white - the purpose
of DRLs is to be seen.

All they do is draw your attention to every single car, you should only have your attention drawn to ambulances etc. I can see a car with no lights on it perfectly well during the day. Adding lights is utterly pointless.

Hopefully they are no brighter than sunlight off a mirrored surface (eg
paintwork, chromework, windscreen) and hopefully the intensity reduces as
the level of daylight does.

I shouldn't be seeing sunlight off a mirrored surface everywhere.

Yes, DRLs are fairly bright but I don't find them dazzlingly so, mainly
because they are at the front of cars and therefore are only seen by
oncoming traffic for a short time before the car has passed you.

And when driving in a city, you have a constant stream of them. Your irises close to compensate, so you see pedestrians less easily. DRLs are dangerous, proven by studies, and banned in some countries.

And I don't
notice them being more dazzling on a dull day or at dusk than on a bright
sunny day, which makes me think that there's some adjustment for ambient
light level.

Every car is different (anything from sidelight brightness of 5W to even brighter than full beam (absurd), so you can't do that comparison with random cars.

What I *do* find dazzling are rear fog lights when there's no fog,

I've never switched on a fog light in my life. If people are having difficulty seeing taillights in the fog, they ought to slow down to reduce their stopping distance to the distance they can see them at.

or brake
lights when the driver in front of you in a traffic jam sits stationary,

Nope, they're 21W minus the 2/3rds absorbed by the red plastic. Nothing like 65W.

a few feet ahead of you, with his brake lights on instead of using his
handbrake,

I hate timewasters using their handbrake every time they stop.

or park gear if he's got an auto. I find bright, highly saturated
(monochromatic) lights more distracting and inclined to leave after-images
on my retinas than highly unsaturated white lights.

But we're all different.

I've never heard of someone thinking monochromatic is more distracting.

--
Mary had a little lamb, it walked into a pylon. 10,000 volts went up its arse, and turned its wool to nylon.

On Sat, 30 Jul 2016 20:29:42 +0100, Rod Speed wrote:

James Wilkinson wrote

Nothing is as bright as a daytime running light.

Searchlights are much brighter.

You haven't seen the DRLs around here.

In fact I've even seen BMWs with ORANGE front lights on during the day. That's right, the colour reserved for indicators! I pull out in front of those, assuming they're going left :-)

On Sat, 30 Jul 2016 10:58:59 +0100, Brian Gaff
wrote:

Utter crap.
Sorry but I've not found anyone with a good word to say about them. They
are too bright. If they were no so bright I might believe it.




--
Never dive into deep concrete.

"Dave Plowman (News)" wrote in message
...

In article ,
Bob Minchin wrote:
Graham. wrote:
On Fri, 29 Jul 2016 19:37:09 -0000 (UTC), Chris
wrote:

On a recent trip back to the UK I noticed - whilst travelling mostly
by rail - that at the landings of flights of steps at very many
stations now there are overhead panels of super-bright blue LEDs
tilted downwards towards passengers approaching the stairs. These
panels are *extremely* bright and quite painful to look directly at,
even in daylight. They appear to be left on day and night. Does any
knowledgeable person know what function they're supposed to perform?

To discourage intravenous drug use.


How is that meant to work please. No personal experience in such
matters....

I must lead a sheltered life. I've never seen anyone injecting themselves
with illegal drugs in a tube station. Far more likely in a toilet cubical.

You share cubicles? Oh well, each to his own.

James Wilkinson wrote
Rod Speed wrote
James Wilkinson wrote

Nothing is as bright as a daytime running light.

Searchlights are much brighter.

You haven't seen the DRLs around here.

Corse I have, we import plenty of those.

In fact I've even seen BMWs with ORANGE front lights on during the day.
That's right, the colour reserved for indicators! I pull out in front of
those, assuming they're going left :-)

That's why you go thru so many cars, all those wrecks...

On Sat, 30 Jul 2016 10:58:59 +0100, Brian Gaff

wrote:

Utter crap.
Sorry but I've not found anyone with a good word to say about them.
They
are too bright. If they were no so bright I might believe it.




--
Never dive into deep concrete.