SmartBlue GR reduces the near red part of the spectrum more than the far red. This stimulates natural triggers on the plants which reduces the height of many plants and is also useful in holding them in good condition so that they remain saleable for longer. Plant flowering will be delayed by about 2 weeks and have a shorter intermodal length, better basal branching and enhanced leaf colour. GPR's can be reduced or eliminated entirely. Also gives a cooler environment on hotter days.