Within the first few times of using the HappyLight, I immediately felt results. It’s very difficult to explain, however I do believe it has carried into my everyday life and really helped my overall mood. I am typically very sensitive to light (I sneeze when I walk outside if it’s sunny) but I was able to comfortably sit in front of the low and medium settings of my HappyLight. This was such an appealing type of treatment for my SAD, and I’m so glad that I feel it working.