Light Science in Cannabis Cultivation: Innovations Driving Yield and Quality

Mexx Holweg is a researcher specializing in controlled-environment agriculture and plant physiology. Currently he is achieving his PhD in Horticulture and Product Physiology at Wageningen University & Research. His doctoral work focused on the photobiology of medicinal cannabis, with particular emphasis on the effects of light intensity, spectral composition, and air temperature on plant morphology, photosynthesis, and the accumulation of pharmaceutical compounds.

Holweg’s research integrates morphological, physiological, and metabolic analyses to better understand how environmental parameters can optimize crop performance and secondary metabolite production. He has collaborated with both academic and industry partners to advance knowledge in cannabis cultivation under controlled conditions.

Born and raised in a Dutch greenhouse, Sonny developed a passion for plant cultivation from an early age. Growing up surrounded by horticulture laid the foundation for his deep understanding of plant science and commercial growing operations. Sonny has been consulting growers for years on cannabis cultivation in countries where medicinal cannabis is legalized. His cultivation experience and expertise is strengthened as result of his involvement in trials at Wageningen University.

Sonny holds a master’s degree in plant science from Wageningen University & Research, specializing in greenhouse horticulture. He understands the importance of collaboration between the pharmaceutical, horticultural and hobby industries within the cannabis sector. Through his extensive international network and hands-on experience, he has learned that cultivation expertise is a critical factor in the success of professional growing facilities.

Ramon van Esch is a plant specialist at HempFlax Agro BV, where he works on tissue culture, specialized metabolite analysis, and integrated pest management in cannabis and hemp. He has a background in Plant Sciences from Wageningen University & Research, with a strong focus on controlled environment agriculture, plant physiology, and medicinal cannabis cultivation.

Ramon combines hands-on experience in EU-GMP medicinal cannabis cultivation with applied research experience in contract cannabis trials, focusing on how cultivation strategies influence plant performance, flower development, and specialized metabolite profiles.

During his research at Wageningen University & Research, he investigated the effects of UV-A radiation on medicinal cannabis, contributing to a deeper understanding of how light quality can influence cannabis growth, physiology, and phytochemical composition.

Dr. Céline Nicole is an Associate Professor in Horticulture Technologies with a multidisciplinary background spanning physics, plant sciences, chemistry, thermal sciences, sensors, modeling and data science. She also serves as Professor of Horticulture Technologies at HAS green academy. Her primary mission is to bridge the gap between industry-driven applied research and fundamental academic research. Through her dual role, she strengthens collaboration between both institutions and advances their expertise in high-tech horticulture across research and education.

Her research focuses on the application of technology—particularly LED lighting, climate and irrigation strategies, sensors, modeling and imaging—in greenhouse and indoor farming. She specializes in optimizing energy use for crop growth, quality, and nutritional value across a broad range of horticultural crops, including vegetables, fruits, floriculture, medicinal plants, and plant-based proteins.

Professionally, Dr. Nicole has served as Research Program Lead for a controlled-environment farming consortium in the Netherlands and acts as a key contact for public–private open innovation programs. She has extensive experience in generating intellectual property and translating research into industrial applications.