Lighting is an important element of any building. It helps to transform spaces, creates ambiance and provides functional light for various tasks. Proper lighting can also provide an emotional reaction. The basic types of lighting used in buildings are natural lighting which enters through windows and apertures, and artificial lighting such as lamps and lighting fixtures. Natural lighting has the advantage of being free and also helps to define the shape and form of a space. This type of lighting creates a comfortable and energy efficient environment. Natural lighting can be used to bring attention to certain wall elements or objects in a room. Artificial lighting is used to supplement or replace natural lighting and is essential in many buildings. This type of lighting can be used to set the general mood of a space, create a focal point or provide task lighting for specific areas of a room. Artificial lighting should be used properly to avoid harsh shadows and glare. The right kind of lighting can make a big difference in a space. It can create a relaxing atmosphere or an uplifting one. It can also make a room more functional by providing appropriate levels of light in various areas. Good lighting design is necessary for a comfortable and well lit room.