What is the purpose of a gel in lighting?

The purpose of a gel in lighting is primarily to change the color of the light beam. When placed in front of a light source, gels are made from different colored materials that filter the light, allowing the desired hue to pass through while absorbing other colors. This provides the ability to create dramatic effects, set the mood, or ensure color consistency in a production. Gels play a crucial role in enhancing the visual storytelling aspect of performances by contributing to the overall aesthetic and emotional tone of the scene.

Other options, while they pertain to lighting, do not accurately describe the primary function of a gel. For instance, dimming the light or focusing it on a specific area would involve adjusting the light's intensity or direction rather than altering its color, which is the essential role of gels. Similarly, creating a soft edge to the beam is typically achieved through techniques like diffusion rather than the use of gels.