Eyesight not as good as when I was young and a light on a table next to the chair does not make reading much of a pleasure BUT the Sparg solves that problem.  It is really nice to have three levels of brightness and having the arc over the actual reading space is super great.  I really enjoy reading now.  Of course everyone wonders what 'that thing' does until I turn it on and then they are really impressed and love the design.