Light intensity affected yield differently from cannabinoid potency

Methods: University of Guelph researchers grew cannabis across a broad range of LED light intensities and measured flower yield, cannabinoid potency, terpene responses, and leaf photosynthesis during indoor production.

Findings: Flower yield increased across the tested light range, while cannabinoid concentration did not significantly change. Leaf-level photosynthesis responses did not reliably predict whole-crop yield responses.

Limitations: Greater yield does not automatically mean greater profitability or potency. Cultivar, facility conditions, electricity use, and the tested light range constrain transfer to other settings. This was not a comparison of complete home grow-tent systems.