This paper proposes a methodology to derive a black-box model that can predict equivalent melanopic lux (EML) using photopic illuminance as the input. Using this black-box model, we change only the algorithms for existing buildings equipped with controlled lighting based on photopic illuminance. This enables daylight control to satisfy the required EML criterion for humans. Variables in the DELight and split flux algorithms were utilized in the black-box model, and the relationship between the window position and measurement point was set as the main variable. To derive the black-box model, eight of the user's visual orientations (45° intervals) were determined, and eight expressions corresponding to each orientation were derived. A simulation-based validation of the black-box model revealed that 91.12% of all the timeslots satisfied the threshold EML value (200 EML). This value is significantly higher than that observed when lighting control was performed based on a work-plane illuminance of 500 lx (70.5%). The proposed black-box model can satisfy the criterion for sufficient light to reset the circadian rhythm of humans using existing daylight control systems. This study thus presents a method to apply the concept of circadian rhythm for economical and accessible lighting control in buildings.

本文提出了一种推导黑盒模型的方法，该模型可以使用明视照度作为输入来预测等效黑视勒克斯 (EML)。使用这个黑盒模型，我们只更改了现有建筑物的算法，这些建筑物配备了基于明视照度的受控照明。这使得日光控制能够满足人类所需的 EML 标准。黑盒模型利用DELight算法中的变量和分裂通量算法，以窗口位置与测量点的关系为主要变量。为了推导出黑盒模型，确定了用户的 8 个视觉方向（45° 间隔），并导出了对应于每个方向的 8 个表达式。对黑盒模型的基于模拟的验证显示 91. 12% 的时隙满足阈值 EML 值 (200 EML)。该值明显高于基于 500 lx (70.5%) 的工作平面照度执行照明控制时观察到的值。所提出的黑盒模型可以满足使用现有日光控制系统重置人类昼夜节律的充足光线标准。因此，本研究提出了一种方法，将昼夜节律的概念应用于建筑物中经济且方便的照明控制。