## 3 Results
### Case 3--LED Lamp Dimming with Modulation for Rows of Luminaires  
The design of the modular rows of luminaires implied that the luminaires would not all reduce their power by the same amount, but rather that they would do so gradually. For each row of luminaires, a dimmer was inserted that would gradually reduce the power, considering the LEDs closest to the window.  
As shown in Figure 6, the luminaires inside the rooms were divided into control groups of luminaires with different colours: blue (group 1), green (group 2), and red (group 3). It was considered from the observations of case 1 and case 2 that group modulation was not necessary for the classroom.  
Table 11 shows the results obtained for the four rooms by dividing the luminaires into different groups. As in Table 10, the total time off, dimming, and total time on have been highlighted with different colours.  
\begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Spaces**} & \multirow{2}{*}{\begin{tabular}{c} **Dimming** \\ **Groups** \\ \end{tabular} } & \multicolumn{3}{c}{**8 a.m.**} & \multicolumn{3}{c}{**12 p.m.**} & \multicolumn{3}{c}{**4 p.m.**} \\ \cline{3-11}  & & & **Reduced** & **Average** & **I-** & **Reduced** & **Average** & **I-** & **Reduced** & **Average** & **I-** \\ \cline{3-11}  & & & **Single Lamp** & **luminiance** & **N”** & **Single Lamp** & **luminiance** & **N”** & **Single Lamp** & **luminiance** & **Single Lamp** & **luminiance** \\ \cline{3-11}  & & & & **Power (W)** & **(k)** & **Power (W)** & **(k)** & **Power (W)** & **(k)** & **Power (W)** & **(k)** \\ \hline \multirow{2}{*}{\begin{tabular}{c} 1-11 \\ Room \\ \end{tabular} } & & 8 & 0 & 743 & 8 & 0 & 8850 & 8 & 39 & 505 \\ \cline{3-11}  & Group 1 & 2 & 1.95 & & & & & 2 & 0 & \\ \cline{3-11}  & Group 2 & 2 & 21.45 & & & & & 2 & 10.92 & 503 \\ \cline{3-11}  & Group 3 & 2 & 28.08 & & & & & 2 & 15.6 & \\ \hline \multirow{2}{*}{\
\begin{tabular}{c} Gym \\ \end{tabular} } & Group 1 & & & & & & & & 7 & 7.8 & \\ \cline{3-11}  & Group 2 & 15 & 0 & 530 & 15 & 0 & 2991 & 4 & 19.5 & 301 \\ \cline{3-11}  & Group 3 & & & & & & 4 & 25.35 & \\ \hline \multirow{2}{*}{
\begin{tabular}{c} Men’s \\ bathroom \\ \end{tabular} } & Group 1 & 3 & 2.88 & & & & & 3 & 1.2 & \\ \cline{3-11}  & Group 2 & 3 & 13.44 & & & 201 & 2 6 & 0 & 233 & 3 & 14.4 & 202 \\ \hline \hline \end{tabular}
\end{table}
Table 11: Case 3—Evaluation of LED lamp dimming with modulation for rows of luminaires.  
Figure 6: LED luminaires divided into modulation groups.  
At 8:00 a.m., in the classroom and gym, the lighting system was turned off, so again the power was equal to zero. In the other two rooms, however, three groups of luminaires were considered as well as two in the bathroom. In the library, the groups were reduced by 95%, 45%, and 28%, respectively, and those in the bathroom were reduced by 88% and 56%.  
At 12:00 p.m., in all rooms, the power absorbed was zero; therefore, the photosensors did not allow the lamps to be turned on.  
At 4:00 p.m., it was shown that in the library, gym, and men's bathroom, control of the luminous flux took place. In the classroom, all luminaires operated at full power. Specifically, the installation of the photosensors could reduce the lamp output by 72% and 60% in the rows farthest from the window, while the first row would be completely turned off. In the gym, a reduction of 80%, 50%, and 35% could be achieved, in contrast to the bathroom, where a reduction of 90% and 45% could be achieved.