Prospects for LED lighting

More than one-fifth of US electricity is used to power artificial lighting. Light-emitting diodes based on group III/nitride semiconductors are bringing about a revolution in energy-efficient lighting.

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Figure 1: White light from a cone-shaped LED illuminates researchers from the University of California, Santa Barbara.

RANDY LAMB, UCSB

Figure 2: White light based on LEDs.
Figure 3: Historic development of the most common white-light sources and improvements in their ability to produce white light efficiently.

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Pimputkar, S., Speck, J., DenBaars, S. et al. Prospects for LED lighting. Nature Photon 3, 180–182 (2009). https://doi.org/10.1038/nphoton.2009.32

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