In the early AM, when I leave the house and there is no light, I use it to show me my way. It is just so dark outside and no light at all is in the house. I can turn on some lights, but I don’t want to disturb my sleeping wife (I am so nice).
So instead of turning on a light when I need to walk down the stairs, I use my iPhone to light my path.
I can’t tell you how I am looking forward to switching the clocks tomorrow night. It is wayyyy toooo dark in the mornings.