" But this light of Genesis 1:3, while not God, was still unique. It wasn’t sourced in the sun or stars—they wouldn’t be created until Day 4 (see Ch. 8). Fruchtenbaum plausibly argues that the source of this physical light was probably the Shekinah Glory. "

― Jonathan Sarfati , The Genesis Account: A Theological, Historical, and Scientific Commentary on Genesis 1-11