Light behaves like … well, like light. It can’t penetrate walls but it sure bounces around.
Light has personality that depends on the source and what it bounces off of. Glowing metals and glowing gases in light bulbs have different colors as do fires, nuclear reactions and electronic gizmos.
It also reflects off all kinds of things, like sky, pavement, buildings, walls, ceilings and stuff. It also filters through materials like lamp shade shades, clouds, light bulbs, water and windows.
So then, what is natural? How should it look in a photo?
What feels right.