Light can lend visual hierarchy to a design, or unify many features to be read as a coherent whole. One can build a light environment by layering different luminaires that fulfil different lighting requirements. Visual comfort is a crucial aspect of exterior lighting. This can be achieved by providing a base level of illumination to manoeuvre through a space. Systems that throw light with a narrow beam, such as spotlights or food lighting, can be implemented to draw focus to landscape features, facade elements or even a single tree.