In this project, innovative multi-waveband LED light units (RAYN) will be used with precise spectral and intensity controls. Research on plant-light interactions is therefore no longer limited to traditional blue and red wavebands and their typical ratios, or to white light, but specific light recipes depending on the research goals can be created from 12 different wavebands, including UV and far-red, by simple touch control. RAYN LEDs will also be mounted in a climate chamber (ICH260 with temperature range between -10°C and 60°C) to create an unparalleled research unit to investigate light-plant-insect interactions, frost stability of plant sensors and the relevance of green tissues to plant hydraulics during frost.