The thing that Sony is trying to do is emulate books - period.
I hear many complaints about all sorts of missing features like web browsing, searching, and on and on. People seem to want a big PDA that is also a book reader. I'm glad it does it's One Thing well: it emulates books. Books don't have built in lights. I've used a book light for years. My current favorite is
THIS LED MODEL. It uses AAA batteries and lasts for a long time - very bright. It works well with the reader, either clipped onto the back cover or laying on my chest as I read in bed.
PCH