Patent ID: 8543249

Claim:
A lighting fixture to provide variable occupancy-based lighting of an environment, the lighting fixture comprising: a modular sensor bus; an occupancy sensor, operatively coupled to the modular sensor bus, to provide occupancy information representing a presence or an absence of an occupant in the environment; an ambient light sensor, operatively coupled to the modular sensor bus, to provide ambient light information representing an ambient light level in the environment; a plurality of light-emitting diodes (LEDs) to provide the variable occupancy-based lighting at a plurality of light levels; and a power management unit, operatively coupled to modular sensor bus and the plurality of (LEDs), to control the variable occupancy-based lighting based at least in part on the occupancy information provided by the occupancy sensor and the ambient light information provided by the ambient light sensor, the power management module including: a memory to store a set of rules managing the variable occupancy-based lighting according to the occupancy information and the ambient light information, the set of rules including at least one rule that determines one or more weights to apply to each of the occupancy information and the ambient light information so as to produce weighted signals; and a processor to select one of the plurality of light levels based on the set of rules in the memory, the occupancy information, and the ambient light information so as to provide the variable occupancy-based lighting and to combine the weighted signals via an arbitration algorithm stored in the memory, and to determine an adjustment to the variable occupancy-based lighting according to an output of the arbitration algorithm.