## 3 Results and Discussion
### Discussion  
It is worth noting that the results analysis of the experimental plan suggests that during the last days of the considered growth cycle (days 26-30), the light recipe had no substantial effects on the plant's parameters of interest. Therefore, with a green economy perspective, the one having the lower power consumption can be chosen. Summarizing, it clearly appears that it is important to consider the presence of White LEDs to maximize growth properties, in combination with HR:DB ratio, only at the beginning of the growth period (15, 20 and 25 days of observation). This result is in agreement with the literature and concerns not only basil, but also other vegetables. Customized light recipes with different colors of the light spectrum and different mutual ratio and interactions are also important for plant development [38; 39]. For example, it has been found in the literature for radish microgreens, cabbage, broccoli and basil [20; 27], and further confirmed for basil in this study (Table 10), that the increase in the percentage of blue light after a certain amount of time had a negative effect on plant growth and yield, so best growth performances can be obtained by limiting it. Nevertheless, blue light is capable of reducing edema and improving basil compactness; therefore, a small quota of this light should be kept [20]. In addition, the importance of White LED light on the growth performance of basil has been clearly assessed, improving the results already reported in our related work [26] and in agreement with previous literature [27; 28; 29; 40]. Nevertheless, it must be noted that the proportion of reddish light to white light should always be favorable to reddish light, as it is more capable of increasing canopy yield by improving photosynthesis, as previously reported in the literature [28; 40]. On the other hand, towards the end of the growth (30 days of observation), Distance, or light intensity, was the only important factor. This means that, at 30 days, light intensity is the only  
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Growth Period** & **Combined** & **PPF** & **PPF** & **PPF** & **Total PPF** & **PPF** & **PPF** & **PPF** & **PPF** \\
**[Days]** & **Module’s Code**\({}^{\star}\) & **HR** [\(\mu\)**m/s] & **DB** [\(\mu\)**m/s] & **WW** [\(\mu\)**m/s] & **[\(\mu\)**m/s] & **[\(\mu\)**m/s]** & **HK** & **DB** & **White** \\ \hline
0-20 & 8 HR 10 DB/WW & 16.11 & 22.62 & 8.84 & 47.57 & 26.93 & 33.87 & 47.56 & 18.88 \\
21-25 & 6 HR 18 DB & 36.25 & 13.57 & 0.00 & 49.82 & 28.21 & 47.31 & 33.82 & 18.87 \\
26-30 & 18 HR 6 DB & 12.08 & 40.72 & 0.00 factor which must be taken into account to enhance basil growth, and each ratio of HR:DB or the presence or absence of white LEDs, can be chosen without affecting basil growth. Since it is important to obtain a given light intensity, the selection of light recipes could be based only on one goal, i.e., the lower energy consumption. This approach is similar to the one studied by [PERSON] et al. which considered different light intensities with a given light recipe [23]. As the relevance of distance or light intensity increases with time, it is important to choose the right distance between plants and LED modules, depending on which parameter is necessary to promote. In fact, a wise choice could be to bring the plant canopy closer to the modules, avoiding damages due to too strong light intensity. An initial large distance would mean an increased use of space, which is a problem for an indoor farm, while a short distance would mean that the canopy of growing plants would come too close to the LED modules. Regarding the canopy morphological characteristics, this result is in agreement with the one obtained by [PERSON] et al. about red lettuce; higher light intensities promoted several morphological adaptations, increasing leaf thickness and stomatal density that resulted in a more compact canopy [41].