Understanding and applying optimal light spectra for cannabis cultivation
Different light spectra promote different stages of development. Blue light (400-500nm) stimulates vegetative growth, red light (600-700nm) promotes flower formation. UV-A (315-400nm) increases resin production. Infrared (700-800nm) lengthens internodes. Optimum spectra: vegetative 6500K with high blue component, flowering 3000K with red emphasis, finishing with UV-A addition.
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