Light pollution, unwanted or excessive artificial light. Like noise pollution, light pollution is a form of waste energy that can cause adverse effects and degrade. Light pollution, also known as photopollution, is the presence of anthropogenic light in the night environment. It is exacerbated by excessive, misdirected or obtrusive uses of light, but even carefully used light fundamentally alters natural conditions.‎Light pollution · ‎Ecological light pollution · ‎Polarized light pollution · ‎Skyglow. Interactive world light pollution map. The map uses NOAA/EOG VIIRS/DMSP (, , , , , , ), World Atlas overlays and SQM.


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Example of useful light and light pollution from a typical pole-mounted outdoor luminaire Source: Glare can be thought of as objectionable brightness. It can be disabling or discomforting.

There are several kinds of glare, the worst of which light pollution disability glarebecause it causes a loss of visibility from stray light being scattered within the eye.


This can lead to species decline of plants that are unable to reproduce, and change an area's longterm ecology. Lampyridae, Phengodidae and Elateridae are especially interesting study objects for light pollution, once they depend on their own light to reproduce and, consequently, are light pollution sensitive to environmental levels of light.

These nocturnal animals are very susceptible to light and its effects.

Light Pollution Is a Big Problem, But You Can Help

A study [64] also suggests deleterious impacts on animals and ecosystems because of perturbation of polarized light or artificial polarization of light even during the day, because direction of natural polarization of sun light and light pollution reflection is a source of information light pollution a lot of animals.

This form of pollution is named polarized light pollution PLP.

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Unnatural polarized light sources can trigger maladaptive behaviors in polarization-sensitive taxa and alter ecological interactions. Estimates by the U. Fish and Wildlife Service of the number of birds killed after being attracted to tall towers light pollution from 4 to 5 million per year to an order of magnitude higher.

Light Pollution Is a Big Problem, But You Can Help

Similar disorientation has also been noted for bird species migrating close to offshore production and drilling facilities. Studies carried out by Nederlandse Aardolie Maatschappij b.

In earlythe lights were installed on the Shell production platform L It is a common misconception that hatchling sea turtles are attracted to the moon.

Rather, they find light pollution ocean by moving away from the dark silhouette of dunes and their vegetation, a behavior with which artificial lights interfere. Introduced light sources during normally dark periods can disrupt levels of melatonin production.

light pollution


Melatonin is a hormone that regulates photoperiodic physiology and behaviour. Some species of frogs and salamanders utilize a light-dependent "compass" to light pollution their migratory behaviour to breeding sites.

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Introduced light can also cause developmental irregularities, such as retinal damage, reduced juvenile growth, premature metamorphosis, [72] reduced sperm production, and genetic mutation. What is Light Pollution? Most of us are familiar with air, water, and land pollution, but did you know that light can also be a pollutant?

But a growing body of light pollution links the brightening night sky directly to measurable negative impacts on human health and immune function, on adverse behavioral changes in light pollution and animal populations, and on a decrease of both ambient quality and safety in our nighttime environment.

Astronomers were among the first to record the negative impacts of wasted lighting on scientific research, but for light pollution of us, the adverse economic and environmental impacts light pollution wasted energy are apparent in everything from the monthly electric bill to global warming.