Light therapy is usually started in the fall and continued through spring. When you begin light therapy, your first response will show you whether you need to adjust the intensity or duration. Many people respond to light therapy within 3 to 5 days.
Psychographics is a marketing demographic method used to analyze market segmentation. (The population demography of a specific market) It relates to the lifestyles, attitudes, beliefs, buying motivation, product usage requirements, and product perceptions.
DeepCopy() method. This method calls a copy costructor. In the copy constructor, the List<T> constructor is called to copy elements of list from an existing object. So if the list of an original object is modified, the list of a deep copyied object is not changed. Similar sample in msdn library: http://msdn.microsoft.com/en-us/library/system.object.memberwiseclone.aspx.