The invention provides a horticulture lighting system (100), comprising (i) alighting device (110) configured to providehorticulture light (111) and (ii) a control system (200) configured to controlthe horticulture light (111), wherein the control system (200)is further configured to provide according to a predetermined time schemeand/or as function of a sensor signal a pulse of horticulturelight (111) in a spectral wavelength region at least comprising blue light(112) during a pulse period selected from the range of 1-60 min.
