The Impact of Supplemental LED Light on Night-time on the Growth, Inflorescence Weight, and Cannabidiol Content of Hemp

In recent years, the use of Light Emitting Diodes (LEDs) in the horticulture sector has gained popularity. LEDs can be utilized as supplemental illumination in greenhouse production systems or as the primary light source in indoor farming.In the current study, the impact of nighttime supplemental LED was compared with the use of natural light.The study revealed that the nighttime supplemental LED light for 8 hours increased the average daily light integral (DLI) by 10.72%.Hemp plants grow to a height of 70.80±11.12cm when placed under natural light, compared to 83.60±17.05cm under additional LED lighting at night.Hemp plants with LED light had an average of 16.20±1.79branches, whereas those with natural light had an average of 13.40±4.45.The average weight of dry inflorescences collected under LED light was 29.40±11.84g, whereas those picked under natural light were 29.00±9.77g.The average cannabidiol (CBD) concentration was 10.31±0.33%when nighttime supplemental LED light was used, compared to 8.53±0.12%for natural light.The group that received nighttime supplemental LED light increased their CBD contents by 20.87%.This study has verified that nighttime supplemental LED lighting system can accelerate the secondary metabolism rate of C. sativa when compared with those plants cultivated under normal solar irradiance.