// Definition
Customized LED light spectrum configurations designed to optimize specific secondary metabolite expression in cannabis. Different ratios of blue, UV, and red wavelengths can drive different terpene and cannabinoid profiles from the same genetic material.
// From the Episode
Thomas from Grandmaster LEDs explained that natural sunlight contains 25-30% blue and UV light, while traditional HPS grow lights have only about 4% blue. His research showed that testing the same cultivar under multiple spectrums reveals dramatically different expressions. Colin Palmer advocated for 'agricultural buildings' with glass roofs combining natural sunlight with supplemental LED for optimal terpene production. Johnny B called light recipes 'the future' of indoor cultivation.