Researcher discusses ill effects of light pollution
Two-thousand dead birds lay spread out on a white sheet in Toronto. The mangled birds had collided with skyscrapers, blinded by artificial light reflecting off windows and metal. While Winona's skyline might not pose such a threat to the area's winged population, the city's light pollution still affects birds, bats, insects and humans alike, said one area researcher.
"Winona is a light island,Most conventional downlights use a standard 65-watt incandescent compact fluorescent lights and are run on a switch that typically contains several downlights. For this example we'll say there are a total of six lights on a switch." said Jim Berglund, a Winona State University graduate.
Berglund spoke Thursday at a WSU "Big Sky" lecture, part of the university's yearlong academic theme.
Berglund's presentation, based mostly on research he conducted from spring 2009 to spring 2010 as an undergraduate,To begin with, they will make an impact in the decor of the room. Plus, this lighting is fantastic, lending more natural led lights which is always welcomed in any home. highlighted light pollution.
Produced by stray artificial light reflected off moisture particles in the air, light pollution competes with the brightness of the moon and stars.
Migrating birds are confused by brightly lit cities below, and insects drawn to artificial lights become exhausted and die, limiting the food source of bats.
Human sleep patterns are disrupted by excess artificial light, sometimes causing deficient melatonin levels, which has been linked to cancer.Larger kitchens may require one or more ceiling fixtures positioned in the center of the room. Additional perimeter fluorescent bulbs squares or rectangles of lights placed near the walls should be installed for added illumination. These can be in the form of recessed downlight or track lighting. On the other hand, small kitchens may require only either two or three ceiling mounted fixtures or downlight placed near the walls.
Berglund, 25, found the highest concentrations of light pollution in Winona are in commercially zoned areas.
"It's not uniform throughout the city," Berglund said. Commercial zones in Winona's East End retail district and along U.The Led strip light will concentrate its light downwards into the room and has the capability to shine as broadly as a floodlight or as narrowly as a spot light, the choice is really yours.S. Hwy. 61 cause the most pollution, he said.
Berglund also touched on ways some communities deal with the problem.
Some communities and companies offer incentive programs and rebates for energy-saving efforts.
Otter Tail Power Co.Health issues are one of the main reasons that people led spotlight use saunas. If you have been thinking about purchasing one to improve your health issues, you might have made a good decision. The debate over which type, infrared sauna vs traditional saunas should be used, is dependent on what ailment you are trying to relieve. offers 10 cents for every watt saved when commercial or industrial Minnesota companies replace low-efficiency bulbs with compact fluorescent or LED bulbs.
"They largely react to financial incentives," Berglund said.
While Winona's commercial zones make up only 5 percent of zoned area in the city, even Saint Mary's University and WSU, which is zoned as residential, are easily distinguished in a composite aerial photograph Berglund assembled while gathering evidence.
"We're not advocating turning all the lights off on campus," said Jennifer Anderson, a geoscience professor at WSU.
But Anderson and Berglund suggest both shielding existing light fixtures and switching to LED bulbs to minimize stray light, an example the city of Winona has already set.
In 2009, the city saved more than $120,000 from small changes such as replacing inefficient bulbs. Winona's $2 million investment in energy-efficiency is expected to pay for itself within 15 years, the city's environmental health and safety coordinator Dan Wicka has said.
Those efforts have helped, but Berglund said the Island City is literally a bright spot on the map.
"We are the only source of light pollution for about 30 miles," Berglund said.
Two-thousand dead birds lay spread out on a white sheet in Toronto. The mangled birds had collided with skyscrapers, blinded by artificial light reflecting off windows and metal. While Winona's skyline might not pose such a threat to the area's winged population, the city's light pollution still affects birds, bats, insects and humans alike, said one area researcher.
"Winona is a light island,Most conventional downlights use a standard 65-watt incandescent compact fluorescent lights and are run on a switch that typically contains several downlights. For this example we'll say there are a total of six lights on a switch." said Jim Berglund, a Winona State University graduate.
Berglund spoke Thursday at a WSU "Big Sky" lecture, part of the university's yearlong academic theme.
Berglund's presentation, based mostly on research he conducted from spring 2009 to spring 2010 as an undergraduate,To begin with, they will make an impact in the decor of the room. Plus, this lighting is fantastic, lending more natural led lights which is always welcomed in any home. highlighted light pollution.
Produced by stray artificial light reflected off moisture particles in the air, light pollution competes with the brightness of the moon and stars.
Migrating birds are confused by brightly lit cities below, and insects drawn to artificial lights become exhausted and die, limiting the food source of bats.
Human sleep patterns are disrupted by excess artificial light, sometimes causing deficient melatonin levels, which has been linked to cancer.Larger kitchens may require one or more ceiling fixtures positioned in the center of the room. Additional perimeter fluorescent bulbs squares or rectangles of lights placed near the walls should be installed for added illumination. These can be in the form of recessed downlight or track lighting. On the other hand, small kitchens may require only either two or three ceiling mounted fixtures or downlight placed near the walls.
Berglund, 25, found the highest concentrations of light pollution in Winona are in commercially zoned areas.
"It's not uniform throughout the city," Berglund said. Commercial zones in Winona's East End retail district and along U.The Led strip light will concentrate its light downwards into the room and has the capability to shine as broadly as a floodlight or as narrowly as a spot light, the choice is really yours.S. Hwy. 61 cause the most pollution, he said.
Berglund also touched on ways some communities deal with the problem.
Some communities and companies offer incentive programs and rebates for energy-saving efforts.
Otter Tail Power Co.Health issues are one of the main reasons that people led spotlight use saunas. If you have been thinking about purchasing one to improve your health issues, you might have made a good decision. The debate over which type, infrared sauna vs traditional saunas should be used, is dependent on what ailment you are trying to relieve. offers 10 cents for every watt saved when commercial or industrial Minnesota companies replace low-efficiency bulbs with compact fluorescent or LED bulbs.
"They largely react to financial incentives," Berglund said.
While Winona's commercial zones make up only 5 percent of zoned area in the city, even Saint Mary's University and WSU, which is zoned as residential, are easily distinguished in a composite aerial photograph Berglund assembled while gathering evidence.
"We're not advocating turning all the lights off on campus," said Jennifer Anderson, a geoscience professor at WSU.
But Anderson and Berglund suggest both shielding existing light fixtures and switching to LED bulbs to minimize stray light, an example the city of Winona has already set.
In 2009, the city saved more than $120,000 from small changes such as replacing inefficient bulbs. Winona's $2 million investment in energy-efficiency is expected to pay for itself within 15 years, the city's environmental health and safety coordinator Dan Wicka has said.
Those efforts have helped, but Berglund said the Island City is literally a bright spot on the map.
"We are the only source of light pollution for about 30 miles," Berglund said.
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