SHADECO: A low-cost shadow-ring for diffuse measures: State of the art, principles, design and application

To demonstrate the low cost-saving ratio of the data obtains, a study was conducted on predictive modeling of the behavior of an indoor lighting device. Two models are compared: one using diffuse illuminance deduced (from kt) and the other using the diffuse illuminance obtained with SHADECO. Using data measured instead of data deduced can improve by almost 34% the model's accuracy.