What are the best Book Lights ???

[jtice]

I am looking for the best book lights that are out there.

I need something that runs for a long time, doesnt have to be super bright, just enough to read a book, or kindle type unit in a very dark room.

Would like something that could be clipped or attached to a book, kindle, etc.

Have seen a few that run off both batteries and 120V, that would be nice also.



Thanks

~John