light
May refer to light itself or lights (luminaries, light source).
Light is that which gives sight to the eyes. It is projected from the heavenly bodies or luminaries -the sun, moon, stars, as well as from fire and lightning. These are the only "natural" sources of light.
Symbolically, that which gives knowledge or enlightenment.
Then God said, “Let there be lights in the firmament of the heavens to divide the day from the night; and let them be for signs and seasons, and for days and years; and let them be for lights in the firmament of the heavens to give light on the earth”; and it was so.
Then God said, “Let there be light”; and there was light. And God saw the light, that it was good; and God divided the light from the darkness. God called the light Day, and the darkness He called Night. So the evening and the morning were the first day.
The lamp of the body is the eye. If therefore your eye is good, your whole body will be full of light.
In Him was life, and that life was the light of men. The Light shines in the darkness, and the darkness has not overcome it.