Patent ID: 8842008

Claim:
A load control system for controlling the amount of power delivered from an AC power source to an electrical load located in a space of a building, the load control system comprising: a sensor for detecting the presence or absence of an occupant in the space; and a load control circuit adapted to be coupled in series electrical connection between the source and the load for controlling the amount of power delivered to the load, the load control circuit responsive to the sensor to control the amount of power delivered to the load, such that, while the load control system is operating in a first mode of operation, defined for a first predetermined period of time, the load control circuit turns the load on when the sensor detects the presence of the occupant and turns the load off when the sensor detects the absence of the occupant, and while the load control system is operating in a second mode of operation, defined for a second predetermined period of time, the load control circuit turns the load off when the sensor detects the absence of the occupant and does not turn the load on when the sensor detects the presence of the occupant; wherein the load control system is operable to automatically change between the first and second modes of operation.