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Dangers of exposure to 'white' light
Date:9/12/2011

that it is necessary to understand that artificial light creates "light pollution" that ought to be addressed in the realms of regulation and legislation.

Their first suggestion of course, is to limit the use of "white" light to those instances where it is absolutely necessary. Another suggestion is to adjust lampposts so that their light is not directed beyond the horizon, which would significantly reduce light pollution. They also advise against "over-lighting", using only the amount of light needed for a task, and, of course, to simply turn off lighting when not in use - "Just like we all turn off the light when we leave the room. This is the first and primary way to save energy," the researchers say.

"Most Italian regions have legislations to lower the impact of light pollution, but they still lack a regulation on the spectrum emitted by lamps. Unless legislation is updated soon, with the current trend toward sources as white LEDs, which emit a huge amount of blue light, we will enter a period of elevated negative effects of light at night on human health and environment. Lamp manufacturers cannot claim that they don't know about the consequences of artificial light at night," says Dr. Fabio Falchi of ISTIL.

"As a first step in Israel, for example, the Standards Institution of Israel should obligate bulb importers to state clearly on their packaging what wavelengths are produced by each bulb. If wavelength indeed influences melatonin production, this is information that needs to be brought to the public's attention, so consumers can decide whether to buy this lighting or not," Prof. Haim says.


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Contact: Rachel Feldman
rfeldman@univ.haifa.ac.il
972-482-88722
University of Haifa
Source:Eurekalert

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