Living close to the 45th parallel, I always love the dueling advice of “wake at the same time every day” and “get sunlight as soon as possible - avoid artificial light!” To follow that, I’d have to wake at about 09:30 each day rather than my preferred 05:00.

Also, this “MyLux” app you recommend doesn’t exist. There are a few light meter apps in the iOS App Store, but they’re for photography - not what you’re recommending.