They can also be used in a scene to create dramatic lighting effects ... Both ends of the beam are rectangular, and the face from which the light emits covers a much bigger area than a spotlight ...

Gavin favors simple, one-light setups but for a more dramatic look ... to focus the light on the model’s face, creating traditional 1940s-style film lighting with contrasting shadows.

Photoshop CC 2018 tutorial showing how to create a dramatic, cinematographic, red / blue face portrait. Get 15% off BORIS FX OPTICS! - The BEST special effects plug-in for PHOTOS in Photoshop!