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Hemp plant under treatment in steel made chamber (80 cm × 60 cm × 80 cm) equipped with different LED light. Here and subsequent models: L1, Natural light; L2, White; L3, R8:B2; L4, R7:B2:G1; L5, R7:B2:FR1; L6, R6:B2:G1:FR1; L7, R5:B2:W2:FR1; L8, R5:B2:G1:FR1:UV1; L9, R6:B2:FR1:UV1; L10, R4:B2:W2:FR1:UV1; L11, R2:B2:G2:W2:FR1:UV1. All treatments used a photosynthetic photon flux density of 300 µmol m−2 s−1.
