LED energy saving contributing to light pollution – tech2.org

LED energy saving contributing to light pollution



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  Energy-saving LEDs that contribute to light pollution

LED lights save energy and offer better lighting, but also cause light pollution, according to new research conducted by Christopher Kyba of the German GFZ Research Center for Geosciences. Homes are switching to LED lights as they offer more lumens for every watt of electricity they consume. The research report reported that the surface of the Earth artificially illuminated has been increasing in recent years. The research team estimates that approximately 2.2 percent annual increase in the radiance of our planet can be attributed to artificial lighting.

The research team used VIIRS (Visible / Infrared Imager Radiometer Suite) and closely monitored our planet between 2012 and 2016. The VIIRS equipment has been mounted on the NOAA Suomi-NPP satellite. The project started in October 2011.

Speaking about the increase in light pollution, Kyba added: "The increase in light emission corresponds closely to the increase in Gross Domestic Product (GDP), with the fastest growth occurring In developing countries, we also see that only a part of the light increases. "

Photographs taken from the International Space Station, which collect all visible wavelengths, show that cities change from yellow to blue. The use of CFL and LED lights has increased in recent years.

The research team observed that the emission of light per capita in the United States is 3 to 5 times more than the emission of light in Germany.

"Generally when we think about how humanity messes with the environment, it is costly to correct or reverse it," Kevin Gaston of the University of Exeter. Gaston did not participate in the current research project.

The results of the study have been published in the journal Science Advances.

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