Push bikes use flashing front and rear lights to attract the eye for
safety and it works well. My wife has had less near misses commuting
on her bike since we fitted them.
Don't Grand Prix cars have flashing rear lights?
Derek
On 21 Feb 2012, at 10:32, Matthew Wastell wrote:
I really noticed a bike using it recently. Much more than bikes
without. Humans recognise changes much more easily so something
moving or flashing will draw the attention much more.
I think in bikes they are a great idea as the normally combined
single light systems are much harder to notice especially as they
are now generally running headlights on all the time.
Now if we could just get people to use their indicators correctly
that would be nice. Maybe they will be automated some time ;-)
M
On 20 Feb 2012, at 21:56, Eddie <[email protected]> wrote:
There has been a kit that you can retro fit to modern motorbikes that
flashes the brake light. It is available from Acumen electronics and
has been available here for a couple of years now.
Apparently it draws attention to the bike using its brakes.
I am not so sure though that practice in this case is as good as the
theory.
Eddie
On Feb 20, 8:49 pm, Matthew Wastell <[email protected]> wrote:
Some of the modern cars flash the brakes when they are first
applied. Not sure if pressure or g related or time or what but
I've seen on a few high end fancy cars.
On 20 Feb 2012, at 14:43, TonyV <[email protected]> wrote:
I saw a funny the other day, too. A Golf where the centre
brakelight
flashed.
It seemed to be flashing all the time, except when braking when it
came on properly.
At least, I assume it was braking, because he was stopped at a
hilly
junction, but there were no other lights to suggest an
application of
the centre pedal...
Surely somebody wouldn't have been so daft as to deliberately
modify
their rear lights in this way...?
Back to your example.
I'm surprised it's legal merely to flash a light from red to yellow
when operating indicators and sidelights together.
I know it's practical and workable, I'm just surprised it's legal.
But it sounds like an OEM has done it, so I suppose it must be.
It'd be worse when using foglights and indicators - going from
bright
red to bright yellow.
I'm not sure that's enough variety to catch the attention of a
following driver.
All too often the change from "off" to "brake lights" isn't, so I
don't think I'd like to rely on a mere colour change.
And that's before we even consider the issue of colour-blindness!
Also, given your priority order, wouldn't this mean that you lose
the
rear sidelights when the reversing lights are on? Thereby
suggesting
to other drivers that your car is facing the other way?
What about your number plate light? Is that separate, or built-in?
Often manufacturers use the same taillight bulb to illuminate the
plate.
I did buy a few boards to experiment with LED lights - 48 bright
white
SMD LEDs pre-soldered to a board and with all the power circuitry
already fixed in and ready to run at 12v.
(Other sizes are available - from 6 up to 64+ LEDs).
They're being sold on ebay as being suitable for replacing interior
lights and come with adapters for a number of different bulb types.
I was going to try them behind various spare lenses (brake,
sidelight
etc.) to ensure they're bright enough before doing anything drastic
like actually fitting them.
Pity it's not as easy/straightforward to do the indicators - the
loading is different so the flasher unit would think the bulb has
failed.
But it would save me having to make up huge fibreglass boxes to
encase
the rear of the rear lights, as well as solving a few problems with
bad connections due to using 40 year old bulb holders etc.
Question - how legal would this be? Given that I'd be fitting them
behind existing lenses which still carry E-marks.....
For the number plate, I managed to get replacement bulbs which
incorporate 13 SMD LEDs arranged to shine in all directions. These
will fit in the existing bulb holder as a direct swap for the
original
tungsten item. I haven't got round to fitting these yet either.
TonyV.
On Feb 20, 10:35 am, "Jim Hearne" <[email protected]> wrote:
The mention of lights reminded me.
I was behind a car the other day in the dark that had LED rear
lights (factory, not OEM), didn't recognise the make/model.
It used the same section of the rear light for sidelights as
indicators.
When the indicator was flashing it went from dim red (sidelight)
to bright yellow.
The lead me to think, what would be the minimum number of
sections you'd need for rear lights if you used different colour
LEDS to meet the regs.
The 2+2 rear lights use the same bulb for sidelights and fog so
i guess you can combine those.
I think probably 2.
Section 1. Brake lights only.
Section 2. Sidelights (dim red) , Fog lights (bright red) ,
reversing lights (white), Indicators (Yellow) in priority order.
Any thoughts ?
Jim
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