Lighting, the art of arranging light, is both a science and an art. It affects our physical and mental state, affects the ambience of the environment and affects the perception of architecture. Lighting is the deliberate manipulation of light to achieve a practical or expressive purpose. Lighting can be used in combination with colors, materials, and textures to create different atmospheres, enhance visibility, and draw the viewers attention to a particular area. Lighting design is an important dynamic element in the interior design process. It can be used to accentuate a particular aspect of an interior environment, as well as to create a memorable atmosphere. Lighting design is often used in residential, commercial, and institutional settings. In residential settings, lighting serves to create a cozy atmosphere and bring a sense of items being highlighted and emotion into the spaces. In commercial and institutional settings, lighting may be used to make a space look larger, create a more seductive atmosphere, and draw the attention of customers or visitors. Lighting design also plays an important role in providing energy efficiency and cost savings. Lighting is both an art and science. With the right combination of lighting, colors, and textures, designers are able to create a unique and beautiful atmosphere. Lighting professionals are constantly striving to perfect existing techniques as well as innovating new designs and ideas.