Distributed lighting control of locally intelligent luminaire systems

We consider the control of lighting systems with embedded sensing, communication, computation and control functions at the luminaire-level. Each intelligent luminaire has (i) local presence sensing information, (ii) local light distribution information, (iii) a controller that determines its dimming level, and (iv) connectivity with other luminaires in its neighborhood. In a lighting system of such luminaires, we are interested in achieving localized illumination rendering wherein average illuminance levels of L_o and L_u are to be provided in occupied and unoccupied zones respectively, with a given uniformity level. Under these constraints, we minimize the power expended for rendering in the lighting system. A distributed control algorithm is designed to determine dimming levels of each luminaire. The performance of the proposed algorithm is compared with a centralized control algorithm in terms of power consumption and achieved illumination rendering, under different occupancy conditions.