Right. That's an application which actually cares about solar light levels in a region. Most applications care about local time, because when it's 7 AM in Dece

Right. That's an application which actually cares about solar light levels in a region. Most applications care about local time, because when it's 7 AM in December in northern Montana, you're getting out and going places regardless of how much longer it's going to be before the sun comes up. Local morning is only loosely tied to local sunrise, civil or otherwise.