Uv B Light Spectrum

UV-B light spectrum (280–320 nm wavelength) represents the shorter ultraviolet range used in controlled cultivation environments. Breeders and cultivators employ UV-B exposure during flowering cycles, as cannabis plants exposed to this spectrum often develop elevated levels of secondary metabolites, including cannabinoids and terpenes, as a stress-response mechanism. This practice is grounded in plant physiology rather than marketing—UV-B triggers natural defense pathways. Documentation of UV-B effects on cannabinoid and terpene profiles remains limited in peer-reviewed literature, though anecdotal breeding records frequently report observable changes in resin production and aroma intensity. UV-B is distinct from standard grow-light spectra and requires specialized equipment; its application is primarily a breeding and cultivation technique, not a strain characteristic.

Breeders experimenting with environmental stressors use UV-B exposure as a tool to screen for plants with robust secondary metabolite production under stress conditions. This approach helps identify genetics with naturally high resin expression and distinct terpene profiles.