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.

Akira Kudo of Aomori Prefectural Police said snow has to be removed manually between December and mid-February during blizzards.

"We don't have enough staff members to remove snow as more and more LED lights are being introduced," he said.

LED lighting is becoming ever more popular in public and private spaces because of its lower energy consumption.

Fama(Original Chevy Light CO., LTD ), founded in 2005, is a high-tech private enterprise devoted to R&D and production of a wide range of Traffic Signal , including LED Traffic Signal, Pedestrian Lights, Traffic Countdown and Intelligent Traffic Controller of different Specifications.