LED news and insight from our technology editor Steve Bush, who has been messing with LED lighting for more years than he would care to remember.
LED traffic lights and unintended consequences
High electrical efficiency means low heat and, oh dear, LED traffic lights don’t get warm enough to melt snow from their own lenses.
Boing boing has the story.
By the way, LED car headlight makers are aware of the ice and snow problem.
Electronics Weekly knows of at least one that is using a fan to blow air from the LED heatsink over the front glass for defrosting.