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Post Info TOPIC: Light Pollution, Energy Saving, Astronomy


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Street lighting trial on the cards for seven Exmoor parishes

Taxpayers will foot part of the bill in a trial that will see street lighting reduced in seven parishes on Exmoor.
The Somerset County Council scheme includes plans to dim some streetlamps, turn others off between midnight and 5.30am and install lower maintenance and longer-lasting LED lights in new or replacement lamps in a bid to cut costs and reduce the amount of light pollution and energy consumed.

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Red is the new Black

The colour of night-time skyglow may be about to undergo a radical change worldwide, according to scientists of the Freie Universitšt Berlin and the Leibniz Institute of Freshwater Ecology and Inland Fisheries. They predict that with increasing use of LED street lamps, the colour of the night sky will become bluer. To track this change, the researchers developed a prototype measurement device, and used it to show that the sky currently contains far more red light on cloudy nights compared to clear nights. Their report, entitled "Red is the New Black", is published in the journal Monthly Notices of the Royal Astronomical Society.
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Some Harmful Effects of Light at Night Can Be Reversed

Chronic exposure to dim light at night can lead to depressive symptoms in rodents - but these negative effects can be reversed simply by returning to a standard light-dark cycle, a new study suggests.
While hamsters exposed to light at night for four weeks showed evidence of depressive symptoms, those symptoms essentially disappeared after about two weeks if they returned to normal lighting conditions.

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We [Warwickshire County Council] are changing our street lighting policy. A decision has been made to operate approximately 80% of County Council owned street lights on a part night basis. This will mean approximately 39,000 street lights will switch off between the hours of midnight and 5.30am.
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Street lights 'changing ecology on the ground'

The presence of street lights substantially changes the ecology of ground-dwelling invertebrates and bugs, research suggests.
Scientists trapped nearly 1,200 of the animals in areas under and between street lights in Helston in Cornwall.
They report in Biology Letters that invertebrate predators and scavengers were more common near the lights, even during the day.

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Light pollution 'saturates' UK's night skies

Half of the UK's population cannot see many stars because the night skies are still "saturated" with light pollution, campaigners have warned.
Some 53% of those who joined a recent star count failed to see more than 10 stars in the Orion constellation.
That had decreased only very slightly from 54% since 2007, the Campaign to Protect Rural England and the Campaign for Dark Skies said.

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Video: The Magnificent Night Sky - How to Protect It

The advent and spread of electrical lighting has made it ever harder to find the dark skies valued by professional and amateur astronomers, not to mention lovers of starry skies in general. Dr. Wainscoat tells the story about light pollution and astronomy, with special emphasis on light pollution's effects on the world's best astronomical observing site: Mauna Kea on the Big Island of Hawai'i.
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Road lighting 'could be dimmed'

Lights on thousands of miles of major roads in England could be dimmed during quiet periods in a bid to save money and reduce carbon emissions, it has emerged.
The Highways Agency is proposing to reduce light levels on A-roads when traffic levels are "very low".

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Dulverton switches off lights for BBC Stargazing event

People in an Exmoor town have been challenged to switch off their lights as part of a BBC Stargazing event.
It is hoped that if everyone in Dulverton takes part, it will reduce light pollution so the stars can be seen more clearly.

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London's sky reveals 'every planet in the solar system'

A group of London astronomers have shown that despite the worsening light pollution in the capital, it is still possible to spot all that the solar system has to offer.
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