Horticulture master and slave lighting devices

A horticulture master lighting device for illuminating a plant in a plant growing environment, said horticulture master lighting device comprising:

• a light source;
• and
• at least one processor configured to:
• determine one or more horticulture master light settings, and
• control said light source to render horticulture master light based on said one or more horticulture master light settings, said horticulture master light further comprising a modulated light communication signal, said modulated light communication signal comprising a horticulture light protocol identifier.

A method of illuminating a plant in a plant growing environment with horticulture slave light, said method comprising:

• receiving, via a light sensor, horticulture master light from a horticulture master lighting device, said horticulture master light comprising a modulated light communication signal and said horticulture master light illuminating said plant from a first position;
• determining one or more horticulture slave light settings based on said modulated light communication signal;
• and
• rendering said horticulture slave light based on said one or more horticulture slave light settings, said horticulture slave light illuminating said plant from a second position;
• wherein said horticulture slave light is different from said horticulture master light thereby illuminating said plant from said second position with a different horticulture light that illuminating said plant from said first position.