Patent ID: 8410725

Claim:
A horticultural lighting system for irradiating plants in a greenhouse or other living organisms in a predetermined environment, the system comprising a first string of at least one light element, a second string of at least one light element, both strings being electrically connected in parallel with each other, a power supply unit providing an AC current/voltage to the parallel circuit of the strings, and means for energizing the first string during a first half period of the AC voltage and the second string during a second half period of the AC voltage, so that each string radiates pulsed light, said first string and said second string being arranged irradiated, wherein the lighting system is installed in the greenhouse, where the greenhouse has a plurality of different areas, and wherein the first string and the second string are arranged such that only a first area of the greenhouse is irradiated by the pulsed light of the first string and only a second area of the greenhouse different from the first area is irradiated by the pulsed light of the second string.