What type of lighting involves direct illumination from one side to suggest duality in a character?

The type of lighting that involves direct illumination from one side to suggest duality in a character is known as split lighting. This technique is specifically designed to create contrast on the actor's face, illuminating one side while casting the other side in shadow. This dichotomy visually represents the complexity or duality of the character, highlighting internal conflict, contrasting emotions, or different facets of their personality.

In a theatrical context, split lighting can effectively convey deeper narrative themes, allowing the audience to interpret the character's internal struggles or moral dilemmas. It is a powerful tool for both symbolic and narrative purposes, enhancing the storytelling on stage and allowing for a deeper connection with the audience.

Side lighting, while also illuminating one side of a character, typically does not create the same dramatic effect of duality. Cross lighting utilizes two light sources from opposite sides, which gives a more balanced illumination and is less focused on contrasting one side against another. Shadow lighting primarily focuses on the use of shadows to create mood and is not specifically about illuminating one side to suggest duality.