I've tried the Might Bright lights but found that the Verilux Natural Spectrum Deluxe Travel light works better for me. It is hard on batteries (so I use rechargables) but my eyes feel better and the light reflected from the Kindle isn't as bad (at least my wife doesn't complain as much). I also got a dark skin from DecalGirl so the white around the screen on the Kindle2 doesn't reflect so much light.
http://www.amazon.com/Verilux-Natura...3908065&sr=8-1