The weather is changeable, which makes it a particularly dynamic spectacle within the mostly static built environment. Sunlight when applied correctly creates a play of light on the walls and floors, from dawn to sunset. Designing with light contributes to the experience of space.As a specifier, you want to bring people closer to nature by creating spaces within buildings in which the human body functions best. By using natural resources you increase the sustainability of a building. This makes the buildings you design more attractive and thus increases economic and ecological sustainability.