Welcome to the Dark Skies Office
What We Do
What is Light Pollution?
Light pollution occurs when light exists where it is not intended, and is an issue of growing concern in many parts of the world. Unlike other types of pollution, light pollution is easily and quickly reversible and can have near immediate benefits when remediated. There are four major types of light pollution: skyglow, glare, light trespass, and clutter.
Lights from Chicago shine through clouds, which could cause many problems.
Photograph by Jim Richardson, National Geography Image Collection
Types of Light Pollution?
Skyglow occurs when lights are directed upwards to the sky. This type of light pollution is often seen around cities, where the sky is noticeably brighter along a city horizon and celestial objects become invisible or obscured amongst a brightened sky.
Light trespass occurs when light from a fixture crosses property boundaries onto neighboring properties. One example of this is when street lights enter windows of residential homes, lighting up rooms in a home or keeping a resident awake, in addition to or rather than lighting the road.
Clutter is an excessive use of lights to illuminate the same feature. This could be the numerous highway lights or streetlights that occur in rapid succession, so much so that the light from each fixture overlaps with the light from the previous fixture.
Effects of Light Pollution?
Energy & Money
As much as 50% of outdoor lighting in the US is wasted by sending light into the night sky, which is about $2.2 billion every year.
Exposure to artificial light can result in a drop of melatonin production and can disrupt circadian rhythms, both of which can hinder sleep leading to increased anxiety, stress, and exhaustion.
Light pollution accounts for 21,000,000 tons of CO2 emissions annually, contributing to our climate crisis. Outdoor lighting itself contributes to 70% of light pollution. Lights also disorient wildlife that relies on it for communication and navigation including fireflies, birds, bats, and frogs. Also, light pollution prevents communities from observing the night sky.
Reducing Light Pollution?
Astrotourism highlights the local natural resource of stargazing. It creates opportunities for residents from light-polluted areas to observe the Milky Way. This natural phenomena is a highly sought after experience that allows us to recognize that we share a linked human existence. Funding is available for the creation of dark sky places and it is a great opportunity to spread awareness of light pollution. Currently, there are about 200 certified International Dark Sky Places including the existing Newport State Park Dark Sky Place and upcoming Kickapoo Valley Dark Sky, and tthe Kishwauketoe Nature Conservancy Urban Night Sky Place.