This was part of my 2-hour timelapse from a few weeks ago.
This light entered the camera at about 4:30 am and took over after a few minutes. The camera's battery "exhausted", and wouldn't work properly for the rest of the day.
It appears to be the sun, 4:30 am is a little early a month ago for the sun to be rising, but, oh well. You can see the Milky Way and a nice glare as well.