This paper is part of a project to establish the optimal spectral power distributions of LED light sources for use in offices, commerce and homes. The present paper introduces the most important aspects of home lighting and provides recommendations for optimum spectra in the home environment. Visual experiments were carried out in a real scale kitchen/dining room and in a living room environment with the participation of nearly 100 observers. Results have been evaluated with the help of the analytic hierarchy process (AHP) and a modified Thurstone method. As a result of the investigation, optimal spectral power distributions for the home environment are described.
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