This peaked my curiosity since I'm considering moving there. You must be exaggerating a bit since I just looked it up, and around the winter solstice the sun rise set times are like 7:55 - 4:20.
Not Seattle but Portland. It's a slight exaggeration, but not by much. The dreary overcast skies mean that it can be "dark" an hour before the sun sets and doesn't get fully light until well after sunrise.