Hi,
Here is a web site that explains the importance of sleeping in the dark for people with mania.
Science does not know what causes bipolar. They are studying epigenetics.
http://www.newscientist.com/article/...-disorder.html
Quote:
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"I feel this is the best evidence yet, from human studies, supporting the hypothesis that epigenetic mechanisms may drive psychiatric disorders," says David Sweatt, who studies epigenetics at the University of Alabama and was not involved in the study.
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The book
Lights Out does not directly with bipolar but it does talk about the importance of sleeping in the dark.
http://www.amazon.com/Lights-Out-Dav.../dp/0615427359
Mari