The authors have researched and developed an intelligent lighting system for achieving various desired brightness levels for various office workers while reducing power consumption. In an intelligent lighting system, it is necessary to dynamically estimate the influence of lighting and illuminance sensors in order to efficiently carry out an optimum lighting pattern. In some cases, however, it is not possible to accurately estimate the influence of the lighting and illuminance sensors. In this case, more time is necessary to achieve an optimal lighting pattern; therefore, there are problems that need to be resolved with regards to the feasibility of achieving the desired brightness and energy conservation. In light of this, the authors propose a method for more accurately estimating lightings that are located near illuminance sensors. Verification experiments showing the effectiveness of the proposed method verified that the lightings near illuminance sensors could be accurately extracted. Furthermore, since the lighting that has no influence can be taken into consideration, the verification experiments also verified that energy conservation can be improved as the lighting that had no influence could be switched off.
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