## 2 Materials and Methods
### Indoor Lighting System  
Table 4 shows the number of luminaires present in the pre-intervention phase of the school, distinguished according to type, power, composition, and annual consumption based on hours of use. There were no automatic dimming systems. There were 18 W, 36 W, 58 W, 70 W fluorescent luminaires with 1 or 2 lamp compositions. The characteristics of the luminaires are shown in Appendix A.3. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Spaces** & **Area (m2)** & **N\({}^{\circ}\) Calculation Points** & **DA\({}_{\text{av}}\) (\%)** & **DA\({}_{\text{min}}\) (\%)** & **cDA\({}_{\text{av}}\) (\%)** \\ \hline Closet 2 & 3.6 & 3 & 0 & 0 & 1 \\ \hline Bathroom 3 & 19.04 & 19 & 45.68 & 0 & 64.32 \\ \hline Access & 23.13 & 22 & 0 & 0 & 0.95 \\ \hline
**Gym** & **128.61** & **128** & **71.89** & **19** & **86.75** \\ \hline Hallway & 178.61 & 212 & 36.99 & 0 & 51.92 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: \(Cont.\)  
Figure 5: Indoor and outdoor illuminance. Each analysed room was studied using Dialux software, and the number of luminaires for each room to be proposed as an improvement was calculated. Table 5 shows the number of luminaires and their characteristics proposed for the post-intervention phase. The characteristics of the new luminaires installed are shown in Appendix A.4. Table 6 shows for each room on the ground floor the characteristics of the luminaires installed in the pre-intervention and post-intervention phases. Appendices A.5 and A.6 show the values for the first and second floors. There were 10 W, 24 W, and 39 W luminaires. The 24 W lamp was also used in two-piece ceiling lights. All the sources were characterized by a correlated colour temperature of 4000 K. Furthermore, in order to take into account the possible decrease of the luminous flux, a maintenance factor (MF) of 0.8 was set. As well in this table, the rooms in bold below will be highlighted as samples. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multicolumn{6}{c}{**Pre-intervention, Fluorescent Luminaires**} & \multicolumn{3}{c}{**Post-intervention, LED**} \\ \hline \multirow{2}{*}{**Spaces**} & \multirow{2}{*}{**N\({}^{*}\) Luminaires**} & **Composition of Luminaires** & **Operating** **Hours (h)** & **Power (W)** & **N\({}^{*}\) Luminaires** & **Composition of Luminaires** & **Operating** **Hours (h)** & **Power (W)** \\ \hline Room 1 & 8 & 2 & 9 & 58 & 8 & 2 & 9 & 39 \\ \hline Room 2 & 8 & 2 & 9 & 58 & 8 & 2 & 9 & 39 \\ \hline Room 3 & 8 & 2 & 9 & 58 & 8 & 2 & 9 & 39 \\ \hline Room 4 & 8 & 2 & 9 & 58 & 8 & 2 & 9 & 39 \\ \hline Room 5 & 8 & 2 & 9 & 58 & 8 & 2 & 9 & 39 \\ \hline Room 6 & 8 & 2 & 9 & 58 & 8 & 2 & 9 & 39 \\ \hline Storage area & 8 & 2 & 9 & 36 & 8 & 2 & 9 & 24 \\ \hline Disabled bathroom & 1 & 1 & 9 & 36 & 1 & 1 & 9 & 24 \\ \hline Women’s bathroom & 6 & 1 & 9 & 36 & 6 & 1 & 9 & 24 \\ \hline
**Men’s bathroom** & **6** & **1** & **9** & **36** & **6** & **1** & **9** & **24** \\ \hline
**Library 1** & **6** & **2** & **9** & **58** & **6** & **2** & **9** & **39** \\ \hline Library 2 & 12 & 2 & 9 & 58 & 12 & 2 & 9 & 39 \\ \hline Closet 1 & 1 & 1 & 9 & 18 & 1 & 1 & 9 & 10 \\ \hline Closed 2 & 1 & 1 & 9 & 18 & 1 & 1 & 9 & 10 \\ \hline Bathroom 3 & 4 & 1 & 9 & 36 & 4 & 1 & 9 & 24 \\ \hline Access & 2 & 1 & 9 & 36 & 2 & 1 & 9 & 24 \\ \hline
**Gym** & **18** & **2** & **9** & **58** & **15** & **2** & **9** & **39** \\ \hline Hallway & 26 & 2 & 9 & 36 & 26 & 2 & 9 & 24 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Ground floor pre-intervention and post-intervention lamp configurations.