Supplemental lighting method for vertical multi-layer cultivation of wrapper tobacco leaves

A supplemental lighting method for vertical multi-layer cultivation of wrapper tobacco leaves comprising:

• providing multi-layer vertical facilities, the multi-layer vertical facilities including at least one cultivation rack having a plurality of vertical layers;
• providing supplemental lighting systems to each rack layer, wherein for each rack layer the light intensity and light quality provided by the corresponding supplemental lighting system are set respectively according to a determined growth phase of the tobacco leaves during the cultivation process, wherein the process includes cultivation of tobacco leaves through growth phases comprising a clumping period, a vigorous growth period, and a maturity period;
• during the clumping period, the light intensity provided comprises a first light intensity setting;
• during the vigorous growth period, the light intensity provided comprises a third light intensity setting;
• and during the maturity period, the light intensity provided comprises a second light intensity setting;
• wherein the first light intensity setting is between 10-14 μmol·m−2·s−1, the second light intensity setting is between 14-18 μmol·m−2·s−1, and the third light intensity setting is between 18-22 μmol·m−2·s−1;
• and
• the light quality of each supplemental lighting system is obtained by providing a combination of at least two of red, blue, green, and yellow light.