## 3 Results and Discussion
### Circadian Characteristics  
To assess the circadian characteristics, we began by analysing the parameter MAF (Table 2). The highest MAFs occur in the north and in the west with a 45\({}^{\circ}\) elevation from October to March. Specifically, the highest MAF is 1.156, which is located in the north in March at 45\({}^{\circ}\). The most uniform MAFs occur in the east during all months of the year and at the three elevations. The lowest MAF is 0.759, located in the south in December at 15 The mean MAF of all calculated values for the north, south, east and west and for the three elevations (mean \(\pm\) standard deviation) is 0.871 \(\pm\) 0.089 with an annual variation of less than 10%. That is, the MAFs are very close to 1, which means that the evaluated daylights have almost equal photopic and melanopic intensities, which will generate the same image-forming and non-image-forming effects. According to the CIE calculations, higher levels of melanopic EDI are reached (Figure 6) in the east and south orientations compared to the north and west orientations. The months with the highest EDIs were generally the summer months, and the minimum EDI was found in December facing west at an angle of 15\({}^{\circ}\) (5656 melanopic lux). The maximum value was taken in August in an east orientation with an angle of 45\({}^{\circ}\) (88,714 melanopic lux). In general, the lowest melanopic illuminances have been obtained in measurements taken at 15\({}^{\circ}\), and the highest values have been obtained in measurements taken at 45\({}^{\circ}\). Figure 4: Luminance (cd/m\({}^{2}\)) values measured depending on the season (from December 2018 to November 2019); orientation of north (**top**), east (**right**), south (**down**), and west (**left**); and elevation from the horizontal level of 15\({}^{\circ}\) (black), 30\({}^{\circ}\) (striped), and 45\({}^{\circ}\) (grey). \begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline  & \multicolumn{3}{c}{**NORTH**} & \multicolumn{3}{c}{**SOUTH**} & \multicolumn{3}{c}{**EAST**} & \multicolumn{3}{c}{**WEST**} \\ \hline
**MAF** & **15\({}^{\circ}\)** & **30\({}^{\circ}\)** & **45\({}^{\circ}\)** & **15\({}^{\circ}\)** & **30\({}^{\circ}\)** & **45\({}^{\circ}\)** & **15\({}^{\circ}\)** & **30\({}^{\circ}\)** & **45\({}^{\circ}\)** & **15\({}^{\circ}\)** & **30\({}^{\circ}\)** & **45\({}^{\circ}\)** \\ \hline DEC & 0.900 & 0.966 & 1.034 & 0.759 & 0.760 & 0.760 & 0.763 & 0.770 & 0.781 & 0.923 & 0.988 & 1.052 \\ JAN & 0.923 & 0.998 & 1.079 & 0.777 & 0.781 & 0.788 & 0.780 & 0.785 & 0.789 & 0.928 & 0.996 & 1.089 \\ FEB & 0.884 & 0.953 & 1.002 & 0.788 & 0.793 & 0.797 & 0.788 & 0.792 & 0.796 & 0.885 & 0.924 & 0.972 \\ MAR & 0.964 & 1.058 & 1.156 & 0.821 & 0.821 & 0.819 & 0.811 & 0.813 & 0.816 & 0.901 & 0.983 & 1.081 \\ APR & 0.897 & 0.941 & 0.892 & 0.834 & 0.828 & 0.827 & 0.789 & 0.793 & 0.770 & 0.867 & 0.876 & 0.980 \\ MAY & 0.923 & 0.877 & 0.850 & 0.879 & 0.852 & 0.839 & 0.807 & 0.808 & 0.811 & 0.879 & 0.969 & 1.069 \\ JUN & 0.865 & 0.848 & 0.841 & 0.958 & 0.838 & 0.831 & 0.805 & 0.808 & 0.809 & 0.852 & 0.947 & 1.026 \\ JUL & 0.911 & 0.868 & 0.845 & 0.832 & 0.830 & 0.827 & 0.815 & 0.817 & 0.818 & 0.856 & 0.933 & 1.009 \\ AUG & 0.837 & 0.851 & 0.838 & 0.831 & 0.829 & 0.827 & 0.798 & 0.802 & 0.805 & 0.829 & 0.864 & 0.897 \\ SEP & 0.845 & 0.881 & 0.894 & 0.786 & 0.789 & 0.792 & 0.772 & 0.775 & 0.780 & 0.790 & 0.829 & 0.861 \\ OCT & 0.966 & 1.033 & 1.105 & 0.795 & 0.799 & 0.801 & 0.781 & 0.783 & 0.788 & 0.914 & 0.990 & 1.085 \\ NOV & 0.952 & 0.986 & 0.993 & 0.801 & 0.805 & 0.810 & 0.819 & 0.825 & 0.830 & 0.912 & 0.902 & 0.904 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Melanopic Action Factor (MAF) values calculated depending on the season (from December 2018 to November 2019); orientation of north, east, south, and west; and elevation from the horizontal level of 15\({}^{\circ}\), 30\({}^{\circ}\), and 45\({}^{\circ}\).