DESIGN OF LIGHT-DIFFUSING SKYLIGHTS BASED ON OPTICAL PROPERTIES - ESTIMATION AND MEASUREMENT OF LIGHTING QUALITY AND ENERGY SAVINGS

摘要

We endeavored to establish optimum design methods for light-diffusing skylights to reduce the amount of electricity used for lighting and achieve the required uniform illuminance as an appropriate illumination environment. For that purpose, we derived luminous intensity distributions of skylights under the CIE standard clear sky by an optical simulation based on the optical properties of the skylights. In addition, we empirically confirmed the validity of this design approach for a distribution warehouse, and found that the lighting systems combining the diffused skylights and artificial lightings with dimming control reduced the electrical energy of the artificial lighting by 61 percent.