In article ,
The Natural Philosopher wrote:
LEDS die at around 100C. The reason they are used increasingly in
traffic lights is energy efficiency.

Far more likely their long life if correctly driven. If energy
consumption was important with traffic lights they'd turn them off
overnight, etc.

I think you should research that.

Doesn't need research. The reason is reduced maintenance through longer
life. The energy saving is tiny in comparison to that.

First of all there is an efficiency gain, secondly, when has any council
EVER removed or switched off a traffic light, once installed, no matter
how daft its timing, situation or whatever, been?

Perhaps they would if they were really interested in saving energy. But
there isn't a meter on each set of lights, you know, so they simply don't
see any benefit of the reduced power consumption. However, they do with
maintenance costs.

--
*Who are these kids and why are they calling me Mom?

Dave Plowman London SW
To e-mail, change noise into sound.