What is light pollution?
It is all the light that is emitted or escapes above the horizontal of the light in an installation of outdoor lighting. It produces a bright halo or glare on the stock, by illuminating the particles of dust or water the air contains suspended. When there are clouds, the basis of these is illuminated.
We will extend this definition considering how light pollution to all the light that leaks out of the area you want to illuminate, ie, all the wasted light energy, directly or indirectly after it has harmful effects on the environment.
Causes of light pollution
A sampling of some highly polluting luminaires.
– The use of lighting (street lights, floodlights or spotlights, etc) due to poor lighting design or inappropriate placement, leak most of the luminous flux outside the area that needs lighting.
– Excessive light, also produces significant and unnecessary loss of light by reflection on the ground and other objects on lit.
– An over-lit area, causing neighboring areas tend to imitate, matching at least one lighting level, resulting in a “chain reaction” that compounds the problem. This is because the human eye needs a certain time for adaptation to different light levels, so that when we move from an area with too much light to another reasonably well lit have the false impression that the lighting of the latter is poor or insufficient.
– The insensitivity of people and above all responsible entities is due mainly to a lack of information coupled with the fact that frequent live long with this problem, we have become accustomed to it and no longer perceive it as such. All this leads to often when choosing a lamp model, lacking own rational criteria, using the easy to imitate other populations with lighting pollutant, or that only takes into account criteria supposedly aesthetic, forgetting their main function is to illuminate well.