目標為研究評估建築室內照明參數指引，包含設計依據、設計技術。同時尋找其他CIE部門的協助建立室內照明指引。
Division 3: Interior Environment and Lighting Design
Its objectives are to study and evaluate those factors to provide guidance on relevant design criteria, to study design techniques (including relevant calculations) for the interior lighting of buildings, to incorporate the findings and those of other CIE divisions into lighting guides for interiors in general or of particular types.