Supplemental Light Response

Supplemental light response refers to how cannabis plants alter their secondary metabolite production—including terpene and cannabinoid profiles—when exposed to additional artificial lighting during the flowering phase or throughout the growth cycle. Research in controlled environments suggests that spectrum, intensity, and photoperiod adjustments can influence volatile compound expression, though the degree of change varies by genotype and cultivation method. This trait is primarily of interest to researchers and commercial cultivators optimizing indoor environments rather than a sensory descriptor. Understanding light-driven metabolite shifts helps breeders identify genotypes that produce stable, consistent profiles across different growing conditions. Documentation of this response remains inconsistent across studies, making it a complex variable in standardized breeding programs.

Breeders working in controlled-environment agriculture select for genotypes that maintain consistent terpene and cannabinoid expression regardless of supplemental lighting changes, or conversely, identify lines that produce desirable volatile profiles under specific light protocols. This trait supports development of predictable, replicable cultivars for both seed companies and licensed producers.