Jeremy Vine "Have you been blinded by bike lights?"
- Thread starter glenn forger
- Start date
-
- Tags
- lights
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- Location
- Manchester
If a cyclist coming towards you has a light that is so bright that you can't see anything other than the light, then that is what people mean by being blinded. How is that a good thing, that you can't see what is coming towards you and you can't see where you are going? As @summerdays, I have had to completely stop, until people have passed me, then wait for my eyes to adjust. Sometimes, I slow down and put my hand up to shield my face from the person's light.
I have a bright light for unlit paths and roads but if anyone comes towards me, I turn it down or put my hand over it.
I have a bright light for unlit paths and roads but if anyone comes towards me, I turn it down or put my hand over it.
Flick of the Elbow
Guru
- Location
- Edinburgh
I also have a bright light for unlit paths, I have it on my helmet, if I need to shield oncoming users from it I simply tilt my head a few degrees to direct it away from them.
machew
Veteran
totallyfixed
Veteran
- Location
- The only county without a McDonalds
Yes it is so simple, the Germans seem to have mastered it hence why so many of their lights receive praise and are used over here, particularly it seems by Audaxers who also use their hub dynamos. The bike lighting manufacturers are missing an opportunity here, the first one to produce an affordable front light that has a dipped beam and a main beam as per a vehicle will make a fortune. The technology has existed for years, unfortunately at present until the law changes 'boys and their toys" and squillions of lumens [which is an inaccurate measurement for a road light anyway] will continue.
RichK
Guru
- Location
- Birmingham, England
I'm wondering why they've chosen a logarithmic scale on their chart?
Nigel-YZ1
Guru
- Location
- Somewhere else... maybe soon.
How many lumens is the four headlights, fog (sorry, driving) lights and daytime bliders of a modern Mercedes when all used at once?
400bhp
Guru
Yes, they do and I recall, rather freqently, commnents on here about the individuals pointing their lights in drivers rear view mirrors of they had done something that was "disagreeable".
OP
OP
glenn forger
Guest
Which cyclists?
oldstrath
Über Member
- Location
- Strathspey
Because perceived changes in light intensity scale (roughly) as the log of actual intensity.
EDIT: It;'s called Fechner's law:
http://www.telescope-optics.net/eye_intensity_response.htm
Last edited:
oldstrath
Über Member
- Location
- Strathspey
How frightful. How much more frightful than using a few tonnes of metal to frighten or injure people it is to maliciously shine a light at someone. it's a light, not a farking death ray!
totallyfixed
Veteran
- Location
- The only county without a McDonalds
I would assume for display purposes, without which the graph would be enormous with values from about 10 to 10,000.
400bhp
Guru
Lumens are measure in logs I believe.
cd365
Guru
- Location
- Coventry, uk
I would not have been polite to the old fool
