Lighting, the use of artificial light or illumination of a particular area, is a key element and factor in architecture, art, photography, film, television, engineering, theatre and other creative activities. It is often used to create an atmosphere, enhance visual perception and bring out the colors of objects in a space. Lighting has been used since the beginning of time to create a certain mood or ambiance. Ancient Greek temples had elaborate systems of lighting, while churches in the Middle Ages utilized massive stained glass windows to allow light in. In modern times, electricity has allowed for a wider range of lighting options that can be used to great effect, from simple spotlights to complex light shows. In a theatrical setting, proper lighting is essential for creating the desired atmosphere and for communicating the mood of a scene. Different angles of lighting can be used to create shadows, contrast, and focus, while colors can be used to emphasize certain themes or evoke certain emotions. In an architectural setting, lighting can be used to bring out the best of a building's design, from highlighting certain features to creating a comfortable and inviting space. Proper lighting can also help to make a room appear larger, brighter or cozier. Lighting can also be used in photography and film to create interesting compositions and to focus on certain objects or people. In engineering, it is an important tool for gathering data and examining the various structures and systems of an operation. In short, lighting is an essential tool for any project- large or small- and it is key to bringing out the full potential of any subject.