Álvaro Folhas

29 de junho de 2013

Outdoor Lighting and Light Pollution

What is nightscape?

The dark sky with the stars

What is nightscape?

Lighting buildings, streets, and open spaces in urban areas

Where are the stars?

Light pollution in Portugal and Spain

Light pollution in Europe

Light pollution in Europe

Light pollution in Istambul

Light pollution in Egipt

Los Angeles in 1908

Los Angeles in 1988

Light pollution in Earth

Glare: too much background light tat reduces visibility

What is light pollution?

Light Trespass: light spills into an area where it is unneeded

What is light pollution?

Sky Glow: upward directed light reflects on particles in the sky reducing visibility of stars

What is light pollution?

With light pollution & without

With and without outdoor lights on…

Bad & good lighting

Bad lighting

Good lighting

Light pollution simulator

http://www.need-less.org.uk

Night Sky Simulator

Without light pollution(Scotland)

Low light pollution

Moderate light pollution

High light pollution(London)

http://www.need-less.org.uk

Without light pollution(Scotland)

Low light pollution

Moderate light pollution

High light pollution(London)

Night Sky Simulator

Without light pollution(Scotland)

Low light pollution

Moderate light pollution

High light pollution(London)

Night Sky Simulator

Without light pollution(Scotland)

Low light pollution

Moderate light pollution

High light pollution(London)

Night Sky Simulator

Energy, Safety & Cost

Human Health Wildlife

Light pollution affects…Astronomical Research

Solutions

Luminárias blindadasSolutions

Solutions

Solutions

Light shielding demo

GLOBE AT NIGHT

Citizen science programto record the brightness of the night sky

http://www.globeatnight.org

GLOBE AT NIGHT

Dark Skies RangersPortugal

http://dsr.nuclio.pt