Abstract: An environmental control system for a building intended for human occupancy in which the operating environment is controlled in response to any of a plurality of states of the building as represented by a state vector. A plurality of independently operating controllers contain stored sets of addressable control functions which are accessed by the state vector signal. The controllers produce operating point signals for apparatuses which affect operating environment parameters in accordance with the addressed control functions.

Abstract: Light control apparatus and method in which commanded changes in luminance in a space are executed in accordance with a rate function generated by a function generator to correspond to adaptability of the human eye to changes in luminance. A luminance sensor detects the luminance to which a person occupying the space was exposed just prior to the commanded change in luminance. The sensed luminance is used to determine the discrimination range of the occupant, and, upon a commanded increase in luminance in the space, the luminance is immediately increased to within the range.