Light-emitting diodes, or LEDs, are the most efficient and
environmentally friendly light bulbs on the market. But they come at a higher
up-front price than other bulbs, especially the ones with warmer and more
appealing hues.
Researchers at the University of Washington have created a
material they say would make LED bulbs cheaper and greener to manufacture,
driving down the price. Their silicon-based nanoparticles soften the blue light
emitted by LEDs, creating white light that more closely resembles sunlight.