Traffic lights and color blindness (was: Re: Correcting to be polite)

On Mon, 22 Aug 2005 18:13:39 GMT, in message
<nBoOe.282413$5V4.184645@pd7tw3no>
"Karl Johanson" <karljohanson@xxxxxxx> caused electrons to dance
and photons to travel coherently in saying:

>Make sure he can tell which traffic
>light is which, for example (I see red, amber & white, with a few of the
>white lights looking slightly greenish of late).

I think you're noticing the new ones that are LEDs instead of
incandescent bulbs through a blue-green filter. The LED green
lights are _intensely_ green, with no blue component at all, and
much brighter than the incandescents they replace.

I'll be interested to see if the Japanese start referring to them
as "midori (green) shingo (signal)" instead of "aoi (blue)
shingo."

--
Doug Wickstrom <nimshubur@xxxxxxxxxxx>

"We're working on getting rid of unnecesary regulations and making them more
sensible." --Bill Clinton

Now filtering out all cross-posted messages and everything posted
through Google News.


.

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    ... >and photons to travel coherently in saying: ... >>light is which, for example (I see red, amber & white, with a few of the ... >>white lights looking slightly greenish of late). ... >incandescent bulbs through a blue-green filter. ...
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