Three-dimensional simulation of light spectrum and intensity within an LED growth chamber
- Publication Type
- Journal contribution
- Authors
- Tina Hitz, Michael Henke, Simone Graeff-Hönninger, Sebastian Munz
- Year of publication
- 2019
- Published in
- Computers and Electronics in Agriculture
- Band/Volume
- 156/
- DOI
- 10.1016/j.compag.2018.11.043
- Page (from - to)
- 540-548
An increased knowledge of different light spectrum on plant structure and physiology is required for improvinghorticulture production and energy efficiency. This implies a high number of experimental repetitions underuniform and reproducible light conditions. The objective of this study was to create a virtual LED chamber to beused for functional structural plant modelling and for exploring the optimal chamber design regarding lightconditions. The spectral light simulations were evaluated in six heights and seven directions with measurementsperformed in a real LED chamber. The accuracy of the simulations compared to measurements were high with R2between 0.901 and 0.965 with data from different heights and R2between 0.959 and 0.997 with data fromdifferent directions. The mean absolute percentage errors between measured and simulated light intensity indifferent directions were 12.7%, 2.8%, 8.9% and 30.6% for light in the blue, green, red and far-red wavelengthranges, respectively. MAPE from data in different heights were within the same range and showed consistenttendencies between colors. The model was capable of evaluating the light intensity in different directions anduniformity at different heights. Thus the chosen GPUFlux model in GroIMP can be used to simulate micro-lightclimate within an LED growth chamber for functional structural plant modelling and to assist in optimizingchamber design and LED placement for uniform and reproducible light conditions.