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"Feeling moody or depressed? Too much light in your bedroom at night could be to blame, say scientists. Exposure to even the dimmest light while you're as..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.co.uk/2010/11/18/is-too-much-light-in-your-bedroom-making-you-depressed_n_7413994.html>