LED Luminaries

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.

Steve Bush

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