Quantum dot LED lighting
LED lights promise to cut electricity consumption dramatically. One estimate is that they could reduce US electricity consumption by 1/4. Last year we saw LED Christmas lights in the stores, and I recently noticed an ad for normal replacement light bulbs. One issue is that white LED's are generally not really white - they have a blueish tinge.
Over the past couple of days there have been some articles about the use of quantum dots to make white LED's that use even less power than current LED's. No word on when we might actually see products.