Scientists figure out why LED is impractical for general lighting purposes

Their work will help engineers develop a new generation of high-performance, energy-efficient lighting that could replace incandescent and fluorescent bulbs. Scientists at the University of California, Santa Barbara, say that they have figured out what makes light-emitting diodes (LEDs) impractical for general lighting purposes. Chris Van de Walle, a professor in the Materials Department at UC Santa Barbara headed the research group that carried out the work.