Evaluating performance of daylight-linked building controls during preliminary design

Thanks to the spread of new light sources and of smart dynamic control systems, automation sector has begun toplay a fundamental role in lighting design. In this regard, daylight-linked control systems (DLCSs) represent aparticularly interesting researchfield, since they offer great opportunities both in obtaining energy savings andin improving visual comfort conditions. However, their use is not so spread, because of the difficulties in pre-dicting their functioning during the design process and in evaluating their effective energetic and economicadvantages: available technical solutions are so many that design choices can be very hard for specialists. Toovercome these obstacles, a precise assessment methodology is needed. Given these premises, the goal of thepaper is to show the effectiveness of new performance parameters (Daylight Integration Adequacy, PercentageIntrinsic Light Excess, Percentage Light Waste and Percentage Light Deficit) in order to evaluate DLCs perfor-mance and to underline which factors mostly affect their functioning.