The idea of the Lightwedge itself, a sheet of high grade acrylic that spreads the light from small LCD lights across the entire page of the book is clever enough.  It is clear and bright enough to read comfortably by without distracting a bedmate or a seatmate.  Add to this a Harry Potter theme with interchangeable snap-on Potter emblems that allow a custom touch, and you have a great gift for that Potter fan in your life.