Your Online Guide To Light Pollution

INTRODUCTION Light pollution is becoming an issue that

more people are becoming aware of with growing concern

Light pollution by definition is the adverse effects of excessive artificial light

It includes the alteration of natural light both outdoors and indoors.

INTRODUCTION It makes seeing the stars in the night sky

almost impossible in bigger cities, as well as interfering with the observation of the night sky for astronomers

It is also disrupting our ecosystems, and can have adverse effects on our wildlife

There have been studies that show that light pollution can also have negatives effects on our health.

GLARE Glare is the light that shines into a drivers

eyes as they drive down the road

Glare can be very dangerous because it causes reduced visibility while driving, and is the cause of many accidents

An example glare would be the lights on a neighborhood street that shine directly down into a drivers eyes

GLARE These lights are there with the intent of

increasing the security in a neighborhood, when they are actually reducing it because both drivers and pedestrians can’t see well

There are two kinds of glare; blinding glare and disability glare

Both kinds can be dangerous for drivers and pedestrians alike

LIGHT CLUTTER Light clutter is the excessive grouping of

lights

It can cause confusion as well as distract people from obstacles

Light clutter can lead to accidents both on the road and in the sky. It is found along roads where there are many brightly lit advertisements or even just streetlights that are not designed properly

LIGHT CLUTTER On runways, the

lights of nearby commercial lighting can cause light clutter

This causes confusion for pilots trying to land planes

LIGHT TRESPASS         Light trespass is unwanted light on other

people’s property

For example, a house in a neighborhood has a bright light on their house that shines brightly into the window of their neighbor’s home

Light trespass can cause sleep deprivation

LIGHT TRESPASS         There are many cities

and towns in the U.S. that now have standards and ordinances in respect to outdoor lighting 

A simple change in light fixtures can be the first step in reducing light trespass

OVER-ILLUMINATION The concept of over-illumination is simply

excessive light

Over-illumination can include the amount of light used in areas both when they are occupied and unoccupied

There are studies that show that over-illumination can lead to adverse health effects including headaches, stress, and high blood pressure

OVER-ILLUMINATION One of the biggest causes of over-

illumination is light in unoccupied rooms

Many commercial buildings keep the lights on even when the workforce has gone for the day

This results in a large amount of wasted energy

SKY GLOW Sky glow is the effect that looks like an

orange glow in the sky that is seen over highly populated places

It is a combination of all the light reflecting and escaping up to the sky, and then being redirected by the atmosphere back down towards the earth

SKY GLOW Sky glow is measured on a scale with nine

classes

The night sky is rated according to how dark it is and how visible the sky glow is

The best way to reduce sky glow it to choose lights that limit amount of light that reflects up

SKY GLOW Sky glow is measured on a scale with nine

classes

The night sky is rated according to how dark it is and how visible the sky glow is

The best way to reduce sky glow it to choose lights that limit amount of light that reflects up

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