A load control device, such as an LED dimmer switch, for example, may be configured to automatically determine whether to provide a forward or reverse phase control signal to a load. As disclosed herein, such a load control device may provide a plurality of different control signals to the lighting load, for example, during an initial set-up procedure. The load control device may provide the plurality of different control signals to determine an appropriate control signal for the load. Each control signal may be characterized by a load control type and a switching time. The load control type may be one of a forward phase control type, a reverse phase control type, or a full conduction control type. The switching time may include, but is not limited to, switching times of approximately 0 μs, 10 μs, 50 μs, and 100 μs.