It is light that allows us to see space and structure in the first place; and it is lighting that makes architecture and the people, objects and materials in it become visible. Yet more than making things visible, light also determines the way we perceive our environment. It influences our well-being and the aesthetic effect and emotional atmosphere of a room. Lighting design must start with the elements that define a room, such as the walls, floor, ceiling, and openings. Placed in the right light, they emphasise the shape and character of the architecture and provide a background for the objects illuminated in the space.