Light Exposure Degradation

Light exposure degradation refers to the breakdown of cannabinoids and terpenes when cannabis plant material is exposed to prolonged UV, visible light, or heat during storage and handling. Cannabinoids like THC and CBD, along with volatile aromatic compounds, undergo oxidation and structural changes when exposed to light wavelengths above 400nm. This degradation pathway is commonly tracked by seed banks, breeders, and researchers studying post-harvest stability and genetic expression in preserved genetics. Understanding light sensitivity has become relevant to preservation protocols, particularly for heirloom and rare strain lines where material loss directly impacts breeding programs. The process affects both fresh material and dried flower, though dried storage conditions are more controllable for long-term genetic preservation.

Breeders working with rare or limited-run genetics pay close attention to light exposure protocols during seed storage, mother plant maintenance, and phenotype preservation. Selecting for plant structures or cannabinoid profiles that remain stable under standard storage conditions is an indirect but practical breeding consideration.