Bright lights

I wrote about the Amazon Kindle yesterday and am enjoying it more each day, but would like some advice on the best lighting accessory for it. I have tested two so far and they have both been very bright indeed and am thus presuming that an LED solution would be more suitable. Any recommendations besides the ridiculously expensive Amazon lighted case? I want something that lights the whole screen subtly, but without lighting the whole room.

My current solution is below- a plaster on an overly bright reading light.