On Fri, 28 Aug 2009 16:24:55 +0100, bof
wrote:

At night I find the on/off flickering of LED brake lights particularly
annoying

I have never noticed such an effect.

At night move you sight from left to right and you should see the effect
quite clearly, same for the new(ish) flashing orange 'road works' lamps
on motorways, when they're on they are actually flashing.

I'll try it. It may well be an effect that only a low percentage of
people can see. A similar effect is known about DLP projectors. A
small proportion of people see a very annoying fringing effect when
moving their eyes across the screen, whilst the majority of people are
completely unaffected. Putting more sectors on the spinning
colour-wheel increases the colour frame frequency and seems to have
stopped the effect in succeptible people.

--
Cynic