Oaksterdam University’s Vice-Chair of Horticulture, Mike Jenkins Ph.D., was just published in the Journal of Agricultural Sciences. Mike Jenkins’ article Photosynthetic Performance and Potency of Cannabis sativa L. Grown Under LED and HPS Illumination can be found here:
Quick summary of the experiment:
This experiment focused on responses of multiple chemotypes of cannabis to different LED lights as well as a comparison between LED and HPS illumination; results include photosynthesis, light intensity, leaf temperature, light-response curves, and potency.
Summary of major findings:
At the suggested distance from the bulb to canopy in the HPS versus LED comparison (6 inches for LEDs and 4 ft for HPS), carbon assimilation rates displayed a 142% percent increase in plants grown under LED vs. HPS with average photon flux densities of 795 and 298 µmol∙m−2 ∙s −1 for LED and HPS, respectively. All chemotypes of Cannabis sativa L. showed increased cannabinoid potency when grown under LED illumination. The results of this study provide further insight regarding the selection of supplemental light to achieve maximum productivity of Cannabis sativa L.
Jenkins, M.W. and Livesay, C.B. (2021) Photosynthetic Performance and Potency of Cannabis sativa L. Grown Under LED and HPS Illumination. Agricultural Sciences, 12, 293-304.
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