http://www.velux.com/Sustainable_living/Model_Home_2020/The_experiments/Sunlighthouse/daylight/default.aspx

http://eic.velux.com/
http://www.designtoimprovelife.dk/index.php?option=com_content&view=article&id=245:body&catid=10:finalists-2009&Itemid=20