The lighting design aims to enhance the scene and pull all elements together to focus on the message, using selective visibility to only show what the director wants. For the play "Big Love", the main focus is the bathtub set, with soft, low intensity lighting to convey the romantic yet intense themes. Dramatic shadows and spotlights are used during key scenes to emphasize shapes and create a three-dimensional effect, while slow, smooth fading lights indicate visual movement and coordinate the lighting with the overall design.