22 Feb
2010
22 Feb
'10
5:14 p.m.
There was some interesting news on the LED traffic lights and the recent winter storms.
Apparently they don't melt off the snow like the incandescents did. They are talking
about putting heaters back in the lights.
Date: Tue, 23 Feb 2010 00:49:13 +0000
From: pete at dunnington.plus.com
To:
Subject: Re: OT: white LEDs (was: Re: Solderless breadboarding (and 68010 vs
68000))
On 22/02/2010 22:10, Chuck Guzis wrote:
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On 22 Feb 2010 at 22:35, Alexander Schreiber
wrote:
All the traffic lights here have been LEDs for several years. I also
see them in tail lights of cars and other vehicles. A few years ago,
the law for bicycle lights was changed to make LEDs legal (it used to
specify a certain wattage of 6V bulb, which now seems pretty silly given
the way intensity varies a lot with small voltage changes).
--
Pete Peter Turnbull
Network Manager
University of York Although by now the LED light output in general
is high enough that
they are used in traffic lights (a lot of the traffic lights around
here (Zurich) use LEDs).
I see them in tailights for buses and trucks also. They have a
somewhat different color (narrower spectral distribution) than
filtered incandescent lamps.