A green bulb in the grow room for emergencies during dark period, but accessing grow room will risk other spectrum light penetrating upon entry. Better off doing everything when lights are on and not concerning yourself with the green light theory.
snow owl Reviewed by snow owl on . green light could someone give me a scientific reason why green light effects plants during dark hours of flowering, as the plant cannot photosynthesise under this spectrum. This is just a matter of interest as the rule of thumb is no light during flowering, even green light. But if photosynthesis doesn't occur under green light then how can it effect the plant? :confused: Rating: 5