- Adding far-red light during the entire photoperiod alongside the standard PAR light resulted in additional yield
- One of the tomato varieties increased the yield to 16%
Eindhoven, the Netherlands – Signify (Euronext: LIGHT), the world leader in lighting, together with Wageningen University & Research and Nunhems conducted research that shows that the use of far-red light can produce an additional yield of almost one fifth in tomatoes, depending on the variety. The far-red light needs to be added during the entire photoperiod alongside the standard PAR light.
Growers want to get as much as possible out of their LED lights. That’s why Signify, in close collaboration with its partners, is conducting ongoing research into the optimal light recipes and photoperiod (lighting duration) for different crops. This has recently resulted in new insights for tomato cultivation.
It is well-known that the different colors within a light spectrum can have an effect on the development of plants. In fact, crops may react differently to the various colors of light at different times of day. Therefore, this study sought to find the most appropriate time for the application of far-red light. They found that far-red was by far most effective when added throughout the entire photoperiod.
While the outcome confirms the oportunities that far-red light presents , it is not a clear and straightforward equation. “We now have more insight into the impact of far-red light during different periods of the day. The next step is to focus on the ratio between far-red and PAR light to find the ideal balance between growing optimization and energy efficiency.” says Plant Specialist Erik Stappers of Philips Horticulture LED Solutions.