Originally Posted by l_macd
The Kindle appears to have got the quality of the light slightly better, its maybe a bit warmer than the Kobo? However, you have to get one with a 'good' screen, otherwise you might see blotches and some shadows from the leds.
Every PW has small shadow cones at the very bottom of the screen from the LED lighting, when used in the dark. They are below the reading area, and I simply don't consciously notice them.