I've got a Mighty Bright clip on light and the Amazon lighted case for my K3. I personally like the Amazon lighted case the best because it isn't bulky, and it does a decent job of lighting the screen. Using the Mighty Bright clip on is bulky and a pain IMO, and it really doesn't light the screen much better. Plus I get tired of feeding it batteries, even though the three AAA batteries last a long time. It is just much more convenient using the Amazon lighted case and not dealing with the bulk or with batteries.