•Glare - insults the eye, constricts the pupil so you cannot see into shadows.

•Light trespass - When light crosses property lines.   The spillover of light where it’s unwanted and unneeded. A neighbor’s unwelcome light can reduce the value of one’s property.

•Sky glow – light that is allowed to stray sideways or upwards and reflect off clouds and dust particles. It blocks our view of the stars and planets.

•Energy waste- the US spends over 3 billion per year in energy costs from wasted light. The power plants that produce the energy produce greenhouse gasses adding to global warming.

•Light Clutter – using several light colors in one area of view.

Sources of Light Pollution:

•30% to 50% of all light pollution is produced by roadway lighting that shines wasted light upwards and outwards.