PLANT ILLUMINATION SYSTEMS AND METHODS Russian patent published in 2020 - IPC A01G7/00 A01G9/20 

FIELD: crop growing.

SUBSTANCE: system has far-red light source and a controller configured to vary far red light source output. Output streams of far red light source and additional light source are combined to provide amount of photosynthetically active radiation for plant illumination. Controller is configured to vary far red light source output stream so that as far as the output stream of the additional light source changes, the fraction of total far red light in the photosynthetically active radiation is not less than a given low far red light. Method includes far red light feeding, combining far red light and additional light with provision of amount of photosynthetically active radiation for plant illumination and automatic change of far red light so that as far as the additional light changes, the fraction of total far red light in photosynthetically active radiation is not less than a given low far red light. Controller comprises a blue light source and a red light source, as well as a first signal port for receiving a value corresponding to a fraction of total blue light in photosynthetically active radiation, and/or a value corresponding to a fraction of total far red light in photosynthetically active radiation; blue, far red and additional light are combined to provide photosynthetically active radiation; a second signal port for controlling the output stream of the blue light source and/or the far red light source output stream; and a computer-readable program which, when executed, changes (i) the output stream of the blue light source so that as the additional light changes, the fraction of total blue light in photosynthetically active radiation is not less than a given minimum of blue light, and (ii) the far red light source output stream so that as far as the additional light changes, the fraction of total far red light in the photosynthetically active radiation is not less than a given low far red light. Computer-readable data medium contains a computer-readable program which, when executed in the system, executes the method.

EFFECT: group of inventions improves the efficiency of the lighting system.

15 cl, 3 dwg, 1 tbl, 1 ex