Smart light switches connect to a compatible lighting control system or hub through wireless protocols such as Z-Wave or Zigbee, allowing control from wall controls, apps, and centralized automation. A supported hub or controller can link the switches with voice assistants and other smart home devices, enabling scenes, schedules, status feedback, and coordinated actions across lighting and connected systems.

Before installing smart light switches, check for the required neutral, line, load, and ground wires, confirm the electrical box has enough space, and identify whether the circuit uses a single-pole or 3-way configuration. Verify the switch’s voltage and load ratings against the connected LED, incandescent, fluorescent, motor, or other lighting load, and follow applicable electrical codes with the circuit de-energized during installation.

Smart light switches provide app, automation, or voice-enabled on and off control, while smart dimmers also adjust light levels for compatible loads. Accessory switches support three-way control by remotely operating a paired smart switch or dimmer, and some do not connect directly to the lighting load.

Smart light switches with broad load support can control LED, incandescent, halogen, fluorescent, low-voltage, and motor loads, while dimmer models add adjustable light levels. Look for systems that support scenes, wireless control, and multi-gang or multi-device expansion so installers can coordinate lighting across rooms and add circuits over time.