This was recommended to me by my doctor. I have severe insomnia and can get some "winter blues" or Seasonal Affective Disorder and didn't want to take medication so this was the therapy suggested. Now I'm not one to typically go with alternative therapies but this light box has changed my life. I use the light every morning for 15-30 mins. And immediately I feel more awake and energized without the jittery feeling medications can give. It has helped me sleep at night naturally, which hasn't been something I've been able to do before. It's a bit on the pricey side $60-$70 but it's worth it. It's so easy you just make sure the light is at your line of sight for the full time and you're done. Light Therapy is used for insomnia, fatigue, SAD, Bi Polar Depression, and many other things. This light box has the max 10,000 Lux which is what is needed to achieve full therapeutic effect. Many other lights have much lower Lux levels.