Japanese LED traffic lights just too cool when snow falls

Energy-saving LED traffic lights seemed like a cool way to cut back on electricity costs, but Japanese police said Monday they might just be too cool -- because they don't melt snow.

Light-emitting diodes (LEDs) account for around 45 percent of all of Japan's stop-and-go signals and that proportion is growing as local authorities cotton on to their economising possibilities compared with regular incandescent lights.

But in wintery northern Japan the lights have encountered a problem -- drivers can't see them because they don't get warm enough to melt accumulated snow .... https://uk.news.yahoo.com