Sunlight could improve your sleep. I suffered insomnia for many years, taking a huge of medicine. I even thought to quit my IT job due to this problem... Fortunately, I figured this out eventually last week. I happened to read a post on this forum two weeks ago, someone mentioned a great book about how to improve your sleep quality and reduce your sleep time -Powerful Sleep - written by KacperPowtaski. You can download it from internet, and have a look at it and do what it says, I am 100 percent sure that you will get a good sleep everyday. If you want to discuss it with me, just PM me.