I recently purchased the Miniflex for books from Mighty Bright, but I'm considering returning it. It fits well enough on the Kindle Touch with soft padding in the clips so it doesn't damage the Kindle. It's run by two lithium batteries or by using a 4v AC adapter. However, I just came across a Boxwave light for the Kindle Touch and I'm wishing I had spent a little more time looking around online before buying the Miniflex in store. Here's the link: http://www.amazon.com/BoxWave-Amazon.../dp/B000EGUJT2
Oh, I bought the Miniflex for $12.71. The Boxwave light takes 3 AAA batteries or an AC adapter. Probably heavier, but it was 2 LED lights and you change change if you want to use one or two by clicking once or twice.