Which of the following statements best represents the definition of a light dimmer?

A light dimmer is specifically designed to control the brightness of lights, allowing users to adjust the illumination level to suit their preferences or needs in a given space. This functionality enhances the atmosphere of a room, increases energy efficiency by reducing energy consumption when lower light levels are sufficient, and extends bulb life by minimizing their use at full brightness.

In contrast, while changing the color of light, switching outdoor lighting, or sensing motion may contribute to lighting systems, they do not encapsulate the primary function of a dimmer, which solely focuses on adjusting brightness. The ability to fine-tune how much light is emitted aligns directly with the role of a dimmer in residential electrical systems.