I have an Ott-light and migraines and actually find it too intense for me (I have the small desk version). The Ott-lights are designed to correctly display true colors to make matching easier and more accurate. I know that they are used for task lighting, but I don’t think that was their initial use. The floor model maybe better, I don’t have any experience with that. I would suggest getting a nice bright task light for beside your chair. I received mine as a gift but only use it when working with dark (black) fine thread that is difficult to see, I use the regular lamp beside me when I need other additional lighting, because working with the ott-light will often trigger a migraine for me.
One note, the light bulb for the ott-lights and full spectrum lights can be 3-4 times more expensive than traditional bulbs. It is something to keep in mind. I am not one to discourage anyone, just make sure they are aware of all of the facts before they buy.