Street lights are getting gradually more blue-tinged as countries switch to energy-efficient LEDs
Street lighting is getting brighter and more blue-tinged in many countries in Europe – and that may interfere with our sleep and be bad for our health in other ways.
The shift to the bluer side of the light spectrum, caused by increased use of LEDs in public street lamps, has been revealed by informal photographs taken by crew members on the International Space Station .
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