Comparing performance of discomfort glare metrics in high and low adaptation levels

Current discomfort glare prediction metrics usually account for at least one of the two categories effects that induce – saturation and contrast effects. Saturation-driven (overall illuminance on eye) are suited brightly lit scenes in general. On contrary, contrast-driven (luminance ratio field view) perform better high conditions such as with small-sized bright sources. Only a few existing consider both effects, Daylight Glare Probability (DGP). However, even these “hybrid” may underperform other than those considered when they were developed, dim glare. This paper investigates ability current indicators to predict perceived user-evaluated depending different adaptation levels. Towards this end, we used composite dataset six laboratory studies performed previously separately various parts world. According Receiver Operator Characteristics (ROC) findings complementary statistical research, hybrid DGP Eccologit best investigated ranges (dimmer brighter scenes). For single-effect metrics, appear saturation-driven lower levels scenes), while reverse is seen higher (brighter As result, only effect should be caution. Although continue well scenes, further research needed extend their applicability larger variety lighting observed work environments. • We classified compared predictive performance vs. scenes. done daylight-dominated office-like settings. Hybrid generally all scenarios. In bright-light scenarios, outperformed metrics. low-light