What is light pollution?
Light pollution is configured by the use of artificial light excessive and inappropriate.
This happens when a lighting affects areas where artificial light is useless, beyond the levels of intensity as appropriate or when the light radiates beyond the areas intended.
What light pollution cause?
The light pollution is divided into 3 categories according to the National Laboratory of Astrophysics.
A problem for astronomical research caused by light pollution is the increase of the brightness in the night sky, because this light hinders the visibility of the stars. In addition, an inappropriate application may cause discomfort to the population, for example, when the light from outside hits the inside of a house during the night in violation of the properties of the residents, in addition to the visual blurring that can impair human vision causing discomfort even blindness.
- Excess lighting:
The excess of lights, is unnecessarily common in some countries. In the United States, for example, is responsible for a waste of up to 2 million barrels of oil per day. The city of Las Vegas has a peculiar characteristic that are the colored lights that are poorly placed can lead to injuries and distractions.
Types of lighting:
The brightness of heaven:
The light pollution emitted by the artificial light can have range of kilometers. The brightness of the lighting can be seen 300km away, according to the International Dark Sky Association, Los Angeles. In the areas with a higher concentration of air pollution the effect of bad use of lighting is even worse. The color displayed on the screen can be orange in the case of sodium lamps, or white on the use of mercury lamps
In this category the failure occurs when the light from a pole in public lighting, for example, breaks into a room of a residence not allowing the environment to become dark completely.
When the excessive light is not protected and reflected in the horizontal, the vision is uncomfortable and there can be up to blindness momentary, for example when a car is travelling on with high beams in the direction contrary to our own.
How can I contribute with the reduction of light pollution?
Lights up only the lights necessary
Avoid keeping all the lights in the house lit the whole time, the lamp of your outside area by the sample can cause a large impact, it may bother the neighbors, or to reflect on long distance in addition to wasting electrical energy
Close the curtains
When you are using bulbs of the feast, or leave the bulb a room lit for a long time remember to close the curtains so that the light does not leak so much.
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