They are also great as pilot lights on control panels in substations and as indicator lights on overhead pole mounted contactors to show the on / off status.
Then of course as Christmas lights too. Hopefully no more faultfinding on awkward led strings.
Traffic lights ideal, the response time is a lot faster, also they are a lot brighter too.
Sometimes occasional led strings fail but the led cluster still works.
The problem with snow on lenses can be sorted with a heating element or small power resistor within the led housing.
That is the reason that most railway signals have the red lamp at the bottom. No snow build up in front of the lens.
