I use a LED magnifying lamp 100% of the time when scrolling. I originally purchased the Harbor Freight one, it is worth the money, nothing wrong with it, but I did get a headache every I use it for over 20 minutes or so. I attributed it to the plastic lens and the florescent light. For some reason I am sensitive to florescent lights. My be something to do with having glaucoma or the astigmatism in my eyes. I do not know. I decided that as much as I enjoy scrolling, I would invest in a goo lamp. I now have a LED one that has glass lenses. I love it. No problems and I can scroll for long periods.
I still have the florescent one, and I use it in with other equipment like my lathe, where I need to be able to place the light where needed and I do not have stare through the magnifier for periods of time.