Nights have begun to resemble days - in terms of light. In our modern times much of the world is illuminated almost 24 hours as day. But overexposure to artificial light can have negative effects on humans and animals.
A patient in intensive care under a light blanket in Berlin’s Charité hospital
Things are getting ever brighter on Earth. Satellite images taken at night reveal a radiant sea of light that extends almost around the globe. Since the invention of the electric light bulb, light has been associated with prosperity and progress - but too much of it can make you sick. Scientists are already warning of the dangers.
Light pollution in Europe
Disrupted circadian rhythm
Every night, street lamps that spread light in all directions cause billions of insects to perish. Artificial light can also cause migratory birds to lose their sense of orientation and rob humans of a restful night’s sleep. For millions of years, we lived according to a circadian rhythm. Days were reserved to activity, nights for rest and rejuvenation. But cities and mega-cities around the world are becoming increasingly brighter. In commercial districts, video screens and electronic billboards flash and blink into the wee hours at would-be customers, who should actually be sleeping.
Artificial light turns the Hong Kong night into day
Lighting technology of the future
Researchers around the globe are looking into ways of reducing the flood of light to a level that might be considered healthy. Physicists, biologists, physicians and engineers are all working to develop the lighting systems of the future – systems that don’t waste energy or uselessly illuminate the night sky, that don’t kill insects or disrupt sleep. The goal isn’t to leave cities in the dark, but to allow them to shine bright more sustainably and intelligently.
SAT 25.06.2016 – 19:15 UTC
SUN 26.06.2016 – 01:15 UTC
SUN 26.06.2016 – 07:15 UTC
SUN 26.06.2016 – 15:15 UTC
MON 27.06.2016 – 05:15 UTC
MON 04.07.2016 – 09:15 UTC
SUN 10.07.2016 – 03:15 UTC
Lagos UTC +1 | Cape Town UTC +2 | Nairobi UTC +3
Delhi UTC +5,5 | Bangkok UTC +7 | Hong Kong UTC +8
London UTC +1 | Berlin UTC +2 | Moscow UTC +3
San Francisco UTC -7 | Edmonton UTC -6 | New York UTC -4
SUN 26.06.2016 – 09:15 UTC
Vancouver UTC -7 | New York UTC -4 | Sao Paulo UTC -3