The bad news: for people in the northern hemisphere, the days are getting colder and darker.
The good news: if you are one of those people who suffer from S.A.D., then this is an excellent list of lights that can help you deal with it: The Best Light Therapy Lamps for Seasonal Affective Disorder | Apartment Therapy
Better still, there is a wide range of price points and some of them are relatively inexpensive.
Check out the list. If you know someone who struggles with this, then consider this an excellent gift idea.
Bonus: This post was written in 2017. Since then they have updated their list, so check it out again.