The document discusses various lighting techniques used in photography. Key lighting is used to highlight the main subject and is usually part of a three point setup. Fill lighting is added at a different angle to reduce shadows around the subject. Back lighting illuminates the subject from behind. Three point lighting involves key, fill, and back lighting to produce a professional image without shadows on the face. High key lighting uses a single bright light, while low key lighting uses a low angle fill light to create shadows and contrast. Artificial lighting comes from sources like bulbs, while natural lighting can be manipulated based on the sun's position.