Great lights
Great lights, as in luminaries, signify love and faith, and are called in Genesis 1:14-17 the sun, moon, and stars.
(References: Arcana Coelestia 31 [1-3])
Genesis 1:14-17
14
And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:
15
And let them be for lights in the firmament of the heaven to give light upon the earth: and it was so.
16
And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also.
17
And God set them in the firmament of the heaven to give light upon the earth,