>>I have serious doubts that it does. After all a filament bulb
>>is essentially instant on anyway, it must take all of 100 mS
>>to reach full brightness, and fade again
>
>One argument would be that at 70mph you travel a bit
>over 3 meters in 100ms, which is about one car length...

To which my response would be - how many car lengths would you travel in the
human response time ?? It sort of swamps that ...

I seem to remember as a youngster road safety advertising that recommended a
car length per 10mph as a minimum safe following distance, which seemed to
be reasonable for the cars and conditions of the day. Trouble is people seem
to think that cars have improved to the point where this is no longer
needed, despite the additional distractions of radios, cell phones and so
on.

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