For example, thanks to the LEDs, last year we planted in mid-August (week 33) and again this year. Such a planting date is early for a company with a SON-T lighting system. At times when the outside temperatures are high and you want to illuminate, the radiant heat emitted by these lamps is a barrier. The much "cooler" LED's do not have that limitation and, in particular in the fall, when the days get shorter, you can still illuminate enough. We have found that such a strategy produces a strong crop that can make it through the winter. Despite high stem densities, the crop was very vital in spring, while I saw crops with a lot of 'wear' that were grown with SON-T lighting.
In the test department, we work with an energy screen and a diffuse screen. One of the screens was almost always 95% closed in the afternoon during the lighting period, as of 2:00 PM. When the screen was closed, we dehumidified the greenhouse air as much as possible by keeping the air frames above the canopy open. And what turned out? The crop actually did not require a high room temperature to keep up its speed. Avoid radiation, so as to maintain the plant temperature, and here sufficient dehumidification is the key. In addition, more CO₂ remained in the greenhouse.
I think it is great that we have achieved a production of 38.6 kg per m². What is just as nice, I think, is that gas consumption remained at 35 m³ per m². Thus, we have shown that with 100% LED, we can also achieve top production in an energy efficient manner. Lighting with LEDs does require a different kind of cultivation and application of techniques. Then you can gradually start thinking about limiting and reducing fossil energy. Isn't that a nice result from thinking and acting in a different way than in the past?