lighting

As children, we're all taught to turn off the lights behind us as we leave an empty room. But it seems Norwegians have taken that lesson one step further. Along a 5.5-mile stretch of road in Hole, Norway, smart streetlights automatically dim when nobody's around—then come back to full power when a car, pedestrian, or other object approaches. READ MORE: Half of Norway's new-car sales are now hybrids or electrics The system, called Eagle Eye, is manufactured by a Norwegian company called Comlight. It's one of several technologies Norway is deploying to cut its energy use. This particular...