Have you considered an adjustable floor or desk lamp? Preferably one with a focused beam. I know some can be pricey, but maybe you can find a good deal somewhere. My son using one (a cheap one) to read in his bed.
Look at some examples here:
http://www.lampdecor.com/ex/asp/type.../category.html
http://www.lampdecor.com/ex/asp/type.../category.html