Light is something that makes vision possible. It may stem from various things e.g. Candles/fire, flashlight, car headlight, sunlight, moonlight, starlight, or streetlights. Non of which provide spiritual illumination.
Jesus Is The Light Of The World
"In him was life; and the life was the light of men. And the light shine in darkness; and the darkness comprehended it not (John 1:4-5).
Spiritual illumination comes from Jesus. He is man's sustenance; life source. Jesus' light overcomes all darkness. His light/Glory is greater than the Sun. "His going forth is from the end of the heaven, and his circuit unto the ends of it: and there is nothing hid from the heat thereof (Psalm 19:6). Jesus' light pierces man soul and spirit revealing all that plagues him (Hebrews 4:12). In order that God may heal, deliver, and set man free from the darkness; sin, he must walk in the light; follow Jesus. "Then spake Jesus again unto them, saying, I am the light of the world: he that follow me shall not walk in darkness, but shall have the light of life (John 8:12). While ye have light, believe in the light, that ye may be the children of light.....(John 12:36).
Believe In The Light, Walk In The Light. Jesus Is The Light