The invention pertains to a method and system which utilizes individual lighting fixtures and electrical plug controls to provide a rigorous and ubiquitous grid of sensors within or around a facility or facilities. The system utilizes a variety of parameters at the tag, lighting and plug controllers and central processor level to provide unique location and tracking information on objects, equipment, and personnel in the facility. The unique aspects of the system provide higher spatial and temporal accuracy and the ability to track high spatial densities of devices.