Many nocturnal animals that rely on the natural darkness of the night to hunt or to navigate become confused from the obtrusive skyglow of artificial light. Not only does light pollution dissolve our cultural connections and hinder our scientific explorations of the night sky, it also has a negative impact on wildlife. The remaining 10% of that wasted light shines directly in to our line of sight producing glare which destroys our ability to see safely at night. We can see these domes from many miles away and they have a profoundly negative effect on our view of the cosmos. About 50% of emitted light shines directly in to the atmosphere and scatters off molecules and aerosols, a large percentage bouncing back down to Earth, creating the dome of light over cities called skyglow. Many lights are arranged in a way that wastes up to 60% of their emitted light. Photo: Tyler Nordgren, University of Redlands Typical light fixtures can waste 60% of their emitted light.
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