This is grounded in the core of our physiology . There are literally hundreds if not thousands of quality peer reviewed papers showing that light viewing early in the day is the most powerful stimulus for wakefulness throughout the day . And it has a powerful positive impact on your ability to fall and stay asleep at night .
Second of all , if you wake up before the sun is out , you can and probably should flip on artificial lights in your internal home environment or apartment or wherever you happen to live . If your goal is to be awake , if you wake up at four in the morning and you need to be awake , well , then turn on artificial lights once the sun is out . However , once the sun has risen , then you still want to get outside and view sunlight .
I wake up in the morning and I want to reach for my phone , but I know that even if I were to crank up the brightness on that phone screen , it's not bright enough to trigger that Cortisol spike . And for me to be at my most alert and focused throughout the day and to optimize my sleep at night . So what I do is I get out of bed and I go outside and if it's a bright clear day and the sun is low in the sky or the sun is , you know , starting to get overhead , what we call low solar angle , then I know I'm getting outside at the right time .
I wake up in the morning and I want to reach for my phone , but I know that even if I were to crank up the brightness on that phone screen , it's not bright enough to trigger that Cortisol spike . And for me to be at my most alert and focused throughout the day and to optimize my sleep at night .
And it has a powerful positive impact on your ability to fall and stay asleep at night . So this is really the foundational power tool for ensuring a great night's sleep and for feeling more awake during the day . Second of all , if you wake up before the sun is out , you can and probably should flip on artificial lights in your internal home environment or apartment or wherever you happen to live .
