I have migraine and cluster headaches both. With migraine, I experience a lot of photosensitivity. When I experience several cluster attacks, in between attacks, I am often left with photosensitivity as well. When I experience this, it's hard to be around any light source at all. The Allay lamp was helpful. The green light was not as triggering and I was able to use this light when I could not use a regular light. It was helpful when I was photosensitive. I have also been using it to read at night (not on an electronic). This was a bit of an adjustment in routine to leave electronics behind and pick up a regular book and just use the green light. It's soothing and I'm finding I am starting my night of sleep off way better! I have noticed less photosensitivity recently and hope that this continues. The best way to use it is in a dark room with it as the only light source. The Allay Lamp is a new tool in my tool box that I'm glad I have!