In the tenth chapter of Bhagavad-gita, Krishna establishes that light originates in Him. “O son of Kunti, I AM the taste of water, THE LIGHT OF THE SUN AND THE MOON, the syllable om in the Vedic mantras; I am the sound in ether and ability in man”. (emphasis mine, from Bhagavad-gita As It Is, 7.8)
Light Made by Krishna