Last winter, research was conducted into the effects on the greenhouse climate of an LED grow light with a built-in fan in tomatoes. Ary de Jong, director of HortiTech, found that the fan ensures more air movement, a lower RH and a higher moisture absorption than growers who do not use LED ventilation. “This results in considerably lower energy consumption and less discoloration, although this last result was not expected. It does cost a little more electricity, but you get something in return.”

Full-LED grow lights from Climalux with a built-in fan were used in trials performed over the past few months with tomatoes grown at the PROOF R&D centre in Honselersdijk. The focus of this trial was on growing high-quality tomatoes under LED lighting.