By Sleep function - the funtioniert reversed ... the light is slowly darker and then goes out - you can fall asleep even more enjoyable. The head turned slowly and until the lights go out I'm usually asleep.
Very handy, I find this alarm clock that you can even turn the lights down very far and therefore only very subtle light falls into the room. If a couple has a bedroom and separately go to bed you were disturbing each other not because the light is indeed enough to do everything you have to do to go to sleep before, but not too bright to interfere to the already sleeping.
I can fall asleep or wake up any of the problems has only recommend highly this light alarm clock!