A lighting system for facilitating the growth of a plant, the system comprising: an illumination source for emitting a first light absorbable by the plant, said first light having a spectrum and a set of adjustable illumination parameters; at least one light detector for detecting a second light from the plant, wherein the second light is a chlorophyll fluorescence emitted from the plant; and a control structure coupled to the illumination source and the at least one light detector, the control structure being configured for: receiving from the at least one light detector, a signal indicative of the detected second light; determining a growth condition of the plant based on the received signal; determining a set of values for the set of adjustable illumination parameters based on the determined growth condition; and controlling the illumination source to adjust the set of adjustable illumination parameters using the set of determined values for facilitating the growth of the plant; characterised in that: the growth condition is a photosynthesis efficiency of the plant under the first light; and said determining the set of values for the set of adjustable illumination parameters based on the determined growth condition comprises: determining the set of values for the set of adjustable illumination parameters for maximizing the photosynthesis efficiency by using a simulated annealing method or a genetic algorithm. an illumination source for emitting a first light absorbable by the plant, said first light having a spectrum and a set of adjustable illumination parameters; at least one light detector for detecting a second light from the plant, wherein the second light is a chlorophyll fluorescence emitted from the plant; and a control structure coupled to the illumination source and the at least one light detector, the control structure being configured for: receiving from the at least one light detector, a signal indicative of the detected second light; determining a growth condition of the plant based on the received signal; determining a set of values for the set of adjustable illumination parameters based on the determined growth condition; and controlling the illumination source to adjust the set of adjustable illumination parameters using the set of determined values for facilitating the growth of the plant; characterised in that: the growth condition is a photosynthesis efficiency of the plant under the first light; and said determining the set of values for the set of adjustable illumination parameters based on the determined growth condition comprises: determining the set of values for the set of adjustable illumination parameters for maximizing the photosynthesis efficiency by using a simulated annealing method or a genetic algorithm. receiving from the at least one light detector, a signal indicative of the detected second light; determining a growth condition of the plant based on the received signal; determining a set of values for the set of adjustable illumination parameters based on the determined growth condition; and controlling the illumination source to adjust the set of adjustable illumination parameters using the set of determined values for facilitating the growth of the plant; characterised in that: the growth condition is a photosynthesis efficiency of the plant under the first light; and said determining the set of values for the set of adjustable illumination parameters based on the determined growth condition comprises: determining the set of values for the set of adjustable illumination parameters for maximizing the photosynthesis efficiency by using a simulated annealing method or a genetic algorithm. the growth condition is a photosynthesis efficiency of the plant under the first light; and said determining the set of values for the set of adjustable illumination parameters based on the determined growth condition comprises: determining the set of values for the set of adjustable illumination parameters for maximizing the photosynthesis efficiency by using a simulated annealing method or a genetic algorithm.