John Gill, on Gen 1:15

“To shine in the firmament of heaven, and to give light upon the earth. And it was so done.”

“And let them be for lights in the firmament of the heaven,.... To continue there as luminous bodies; as enlighteners, as the word signifies, causing light, or as being the instruments of conveying it, particularly to the earth, as follows: to give light upon the earth; and the inhabitants of it, when formed: and it was so: these lights were formed and placed in the firmament of the heaven for such uses, and served such purposes as God willed and ordered they should.”

Imported from an open dataset — not yet checked against the printed edition.