How to use "daylight" in a sentence

Through the bars, Valjean could see daylight, the river, a narrow riverbank - but how could he get out?

"You think he's licensed for instrument flying? Most businessmen-pilots and hobby pilots aren't certified for anything but daylight."

Then there was a great flash like daylight and this strange object could be seen clearly.

We stayed there all Sunday night and all the next day - the day of the panic - in a little island of daylight, cut off by the Black Smoke from the rest of the world