Denkkader energiezuinige belichtingsstrategieën met LED: Deelrapport I van het Masterplan Licht

The greenhouse horticulture sector in the Netherlands is an important economic sector that produces fresh vegetables, flowers, and fruits year-round. To achieve this, the limited amount of sunlight during the winter months is supplemented with assimilation lighting. To be climate-neutral and remain economically viable by 2040, the high electricity consumption of this lighting must be reduced. The use of LED lighting as a replacement for traditional high-pressure sodium (HPS) lamps is crucial for that, but not sufficient. The Masterplan Light focuses on reducing energy consumption through intelligent lighting control. This practical framework describes 1) existing knowledge about light and plant processes; 2) knowledge gaps regarding dynamic lighting; 3) possible energy-saving lighting strategies. Knowledge gaps include the limits of fluctuating light conditions, the impact of interrupted photoperiods, and the light requirements of plants depending on the cultivation phase. Promising strategies to save energy include increasing lamp efficiency through dimming, interrupting the night, controlling DLI over a longer integration period, or lighting with a more limited spectrum. For research, the biggest questions lie in multi-day light integration for fruit-bearing or flowering crops, and the potential to manage light variation through acceleration/deceleration of growth or through a battery function of the plant.