What is a common use for a wall switch in a residential setting?

In a residential setting, wall switches are predominantly used to control the lighting fixtures within a room. This functionality allows occupants to easily turn lights on or off as needed, providing convenience and energy efficiency. A wall switch is designed to interrupt or complete the electrical circuit that powers the lighting, typically located in an accessible position near the entry of a room for easy access.

While wall switches can be involved in controlling other devices, such as heating systems or fans, their primary and most recognized purpose is related to lighting control. This makes them an essential component in the electrical setup of homes, as they contribute significantly to the usability and comfort of living spaces.