Kobo Aura One (Ereader) f.lux like front light dimming!
This device is exactly the front light I have been wanting in ereader technology! It's an excellent implementation and I think you'd envoy measuring the leds as they change.
Not only does the color (very smoothly) change, it also asks when your bedtime is which is very interesting to me, I think they are trying to compete with other features which is a smart move and one I greatly appreciate.
I don't think this would have happened without f.lux. There would be no demand for these features and it wouldn't have a similar feature on the iPhone. I hope you are making progress with newer versions of android hopefully making the process easier.