Full Spectrum Light

Full spectrum light refers to artificial lighting that emits wavelengths across the visible spectrum (roughly 400–700 nm) plus some ultraviolet and infrared radiation, mimicking natural sunlight more closely than single-wavelength sources. In cannabis cultivation, full spectrum systems—typically LED or metal halide fixtures—are used to support photosynthesis across all growth stages, from vegetative development through flowering. Lineage records frequently report that plants grown under full spectrum conditions often display more robust cannabinoid and terpene profiles compared to narrow-band lighting. Breeders working in controlled environments rely on full spectrum setups to maintain genetic expression consistency and phenotype stability across generations. The technology remains a standard in modern indoor breeding programs seeking reliable trait evaluation.

Full spectrum lighting allows breeders to evaluate phenotype expression, terpene development, and plant structure consistently without wavelength-related artifacts. Standardized light conditions across breeding runs support more reliable comparison of genetic lines and parent selections.