I arrived at the NIMH and met others who were working on light and depression and biological rhythms and that is where the whole story came together. I began to research a condition that I named seasonal affective disorder or SAD, and did research into therapy by exposure to bright light. I'm from Michigan. I recommend that people purchase ready made light units rather than trying to make their own boxes. I have listed some of the prime distributors in my book.
Mornings seem to be the best time for most people to get their light therapy.
That is one way to be sure that you have as little down time as possible. If you have seasonal problems, I would still consider light therapy even if you have no pineal. I work in the Dept. of Psychiatry at a Major University. They see SAD patients all the time. I myself am diagnosed PTSD and Major Depression.