Comparison of conventional street lighting with an "ideal" design
Examples of the LED street lamp's ability to adapt to different configurations
Schematic diagram of the proposed LED lamp
Continental United States as seen at night from the Suomi NPP satellite (Image: NASA Earth Observatory/NOAA NGDC)
Schematic of the new street lamp
For astronomers, a well-lit city means a sky unavailable for study. Worse, light pollution is blamed for affecting bird migration, sea turtle hatching, and wildlife mating and feeding routines. Researchers at National Central University, Taiwan, and Unidad Academica de Fisica, Universidad Autonoma de Zacatecas, Mexico, have attacked the problem with a new LED street lamp designed to shine only where needed, without splashing into unwanted areas, as a way to reduce light pollution while providing better lighting.
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