Are humans sensitive to the amount of light they need for growth, like plants?

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  1. 0 Votes

    You need some light to produce vitamin D. Too much can lead to skin cancer.
    http://www.medicalnewstoday.com/articles/9772.php
    It’s also linked to seasonal affective disorder.
    http://www.scribd.com/doc/8103/How-Sunlight-Can-Affect-Your-Whole-Life

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