What type of circuit allows for both local and remote control of lights using relays?

A low-voltage circuit is used for both local and remote control of lights through the application of relays. This configuration allows for safe operation, as low-voltage circuits typically operate at voltages that minimize the risk of electrical shock. By utilizing relays within a low-voltage circuit, one can control higher voltage lights without exposing operators or the control system to dangerous voltages.

In practical applications, low-voltage circuits enable the implementation of control features like lighting timers, motion sensors, and remote switches that can be positioned away from the actual lighting fixtures. The relays act as switches that open or close the circuit based on the signals received from either the local controls or remote inputs.

In contrast, high-voltage circuits are typically unsafe for direct manual control, and direct circuits focus on immediate on/off control without the added flexibility of remote operation. Multiple voltage circuits, while they can carry different voltages, are not specifically tied to the local and remote control of lights in the same structured manner as low-voltage circuits.