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
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
Luminárias blindadasSolutions
Light shielding demo
GLOBE AT NIGHT
Citizen science programto record the brightness of the night sky
http://www.globeatnight.org
Dark Skies RangersPortugal
http://dsr.nuclio.pt