研究目的

The aim of this study is to assess a new metric which serves to quantify the affinity of electric light sources to daylighting. This new concept can be particularly interesting in those contexts where color perception must be close to that observed under natural light conditions, such as clothing stores, car dealers, galleries, or textile factories.

研究成果

The Daylight Spectrum Index (DSI) demonstrates accurate quantification of color rendering for LED lamps and incandescent lamps, with a relative divergence of 12% and 11% respectively from survey results. However, its performance is less accurate for fluorescent lamps. The study concludes that LED lamps with a correlated color temperature (CCT) between 4000 and 6500 K provide the best color performance and affinity to daylight conditions. The DSI metric, focusing on the affinity of the perceived spectrum of light sources to daylighting, offers a straightforward and accurate method for assessing color rendering, complementing existing metrics like TM-30-15 or CIE 2017.

研究不足

The study acknowledges the subjectivity in color perception assessments through surveys, despite efforts to minimize deviations with a large sample size. The DSI metric's accuracy is lower for fluorescent lamps compared to LED and incandescent lamps, indicating potential areas for optimization in the metric's application to different types of light sources.