Results from the DAYKE-Italy project are presented. An investigation on daylighting in eight classrooms in five Italian universities was carried out through a combined approach: an ad-hoc survey administered to students to investigate how they perceive daylight in classroom, and numerical simulations (DIVA + ALFA) to calculate a set of objective metrics (daylight, circadian, and energy-related). A sample of 542 questionnaires was collected through two sessions and the subjective judgments were correlated to objective metrics. Results from descriptive and statistical analyses showed: (i) the correlation was significant for all daylight metrics: among them, average daylight factor and annual light exposure performed higher correlations compared to daylight autonomy, spatial daylight autonomy and useful daylight illuminance; (ii) rooms with a scarce or an optimal daylight provision (according to standards) were rated with comparable subjective score; (iii) the equivalent melanopic lux showed a higher correlation than daylight metrics based on the horizontal workplane; (iv) energy saving up to 50% can be achieved in the presence of high daylight provision and through daylight responsive controls; however, a relamping of fluorescent systems with LED system is recommended to optimize the consumption; furthermore, estimated saving correlated significantly with objective metrics.

DAYKE-Italy 项目的结果被展示出来。通过综合方法对意大利五所大学的八间教室的采光进行了调查：对学生进行临时调查以调查他们如何看待教室中的日光，以及数值模拟 (DIVA + ALFA) 来计算一组目标指标（日光、昼夜节律和能量相关）。通过两次会议收集了 542 份问卷样本，主观判断与客观指标相关联。描述性和统计分析的结果表明：（i）所有日光指标的相关性均显着：其中，与日光自主性、空间日光自主性和有用日光照度相比，平均日光因子和年光照量具有更高的相关性；(ii) 具有稀缺或最佳日光供应（根据标准）的房间的主观评分相当；(iii) 等效黑色素勒克斯显示出比基于水平工作平面的日光指标更高的相关性；(iv) 在提供大量日光的情况下，通过日光响应控制可以实现高达 50% 的节能；但是，建议使用 LED 系统重新安装荧光灯系统以优化消耗；此外，估计的节省与客观指标显着相关。(iv) 在提供大量日光的情况下，通过日光响应控制可以实现高达 50% 的节能；但是，建议使用 LED 系统重新安装荧光灯系统以优化消耗；此外，估计的节省与客观指标显着相关。(iv) 在提供大量日光的情况下，通过日光响应控制可以实现高达 50% 的节能；但是，建议使用 LED 系统重新安装荧光灯系统以优化消耗；此外，估计的节省与客观指标显着相关。