23 Feb
2010
23 Feb
'10
12:49 a.m.
On 22/02/2010 22:10, Chuck Guzis wrote:
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.