Low key lighting is a studio photography technique that uses high contrast between light and dark areas to create a dramatic, moody effect. It relies on accentuating shadows through strategic lighting placement. Images are often black and white but may include a single contrasting color. Several artists are discussed who have used low key lighting, including Quentin Arnaud, whose aim was to make faces "faceless" by shadowing models' features, and Yousuf Karsh, who ensured models could still be clearly seen despite shadowing for less dramatic results than other artists. The document also references an example of the author's own low key lighting photo experiment.