I recommend that most people go with the established manufacturers rather than trying to create your own light box. Secondly, they may have moved a home or office to a dark place. Third, children develop SAD as they grow up. This is about as common as it is in adults. So if you add the numbers affected by SAD and the numbers affected by the winter blues, about 1 in 5 Americans is affected and could use extra light in winter.
Holidays involve many chores and demands.
Cards need to be written, gifts purchased and wrapped and the usual round of social events attended. All of these can pose major stresses for people with SAD and can make the symptoms worse. I should also mention, though, that some people get blue around the holidays for a completely different set of reasons pertaining to emotional reactions to the holidays. Sometimes migraines can be eliminated by starting with dimmer lights and gradually increasing. If that still doesn't work, antidepressant medicines may be the best bet.