Which accessory is commonly used to control the timing of landscape lighting?

The timer switch is commonly utilized for controlling the timing of landscape lighting due to its ability to automate when lights turn on and off at set intervals. This ensures that lights can be programmed to operate during desired times, such as dusk until dawn, which is particularly advantageous for enhancing the aesthetics and security of outdoor spaces. The timer can be adjusted according to the season or specific needs, making it a versatile tool in landscape lighting management.

While other options may serve specific functions in lighting systems—like a relay for controlling electrical circuits, a dimmer switch for modifying brightness, and a photocell for sensing ambient light—the timer switch is specifically designed to provide precise timing control, making it the best fit for this application.