Lighting controls are making their way into increasing numbers of U. S. buildings, but the potential for appli- cation of these technologies is still far from being fully achieved. A key element for decision-makers in choosing lighting control technologies is evidence that these tech- nologies will be effective in reducing rising energy costs. This long-term study adds to the small but growing body of literature describing the potential savings from occu- pant sensors and time-scheduling controls in large open office areas. Occupancy sensing has been shown to be an effective means of reducing lighting energy use in private offices.
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