Genesis 1:14 - Coke's Commentary on the Holy Bible

And God said, Let there be lights— The Almighty now proceeds to furnish the heaven, or expanse of air, after having furnished the earth; and so to complete his inanimate creation. The light, by whatever means till now sustained, was to be collected; or, at least, two great bodies were to be formed, as instruments of the diffusal of it; as lamps, if I may so speak, hung up in the firmament, to enlighten the earth by day and night. For the word translated lights, מארת meoroth, signifies luminaries, or instruments of conveying and diffusing light: and consequently, on this interpretation, no objection can arise from the moon's being an opaque body; since Moses says not, that it is a luminous one; any more than a lamp or chandelier is luminous in itself, though it is the instrument of holding or diffusing light.