Hi fragile,
I didn't even consider a light like the one from Amazon. I'm unsure of how well it would work - it may be fine, it may not. What of comfort? A couple of reviewers have commented on the earpiece. The light seems to use the little button batteries, which is good for weight, but one reviewer says feeding it is expensive.
For me it may not be so good. I wear multifocal spectacles and tend to move my head slightly when reading. My feeling is that the moving light would be a distraction.
I understand your view that the goose-neck type of light is not suitable, because of your reading habits.
The solution I wanted was a cover with built in light powered by the USB. Not possible, I'm afraid.
There were some lights on eBay that were a sheet of acrylic or similar that carried light along what amounts to a plane, but I couldn't see how these would stay in place, nor how anyone would access the controls. Probably an even worse solution for you than a goose-neck light.
I wish you well with your search, and if there is anything else you feel I can help you with, feel free to ask.
Cheers,