He felt the comfort of being part of an eternal cycle symbolized by the gold strips on either side of the black mourning band he wore. Light, dark, light. The dark was just an interval.
In a period piece, particularly a fantasy, the lighting is your own choice, the lenses are your own choice. It's really a great thing for a cinematographer to do. Everything is open for you. You can even be more creative and you can use more shadows than usual.