P-Fit,
Hello my friend. How are you? 
Like many people, you may develop cabin fever during the winter months. Or you may find yourself eating more or sleeping more when the temperature drops and darkness falls earlier. While those are common and normal reactions to the changing seasons, people with seasonal affective disorder (SAD) experience a much more serious reaction when summer shifts to fall and on to winter.
With seasonal affective disorder, fall's short days and long nights may trigger feelings of depression, lethargy, fatigue and other problems. Don't brush this off as simply a case of the "winter blues" that you have to tough out on your own.
Seasonal affective disorder is a type of depression, and it can severely impair your daily life. That said, treatment — which may include light box therapy — can help you successfully manage seasonal affective disorder. You don't have to dread the dawning of each fall or winter.
Because increased sunlight improves symptoms, light therapy is often a main treatment for many people with seasonal affective disorder. Before you purchase a light therapy box or consider light therapy, consult your doctor or mental health provider to make sure it's right for you.
Medications and Psychotherapy may also be considered. Reference: Mayo Clinic