Growing without daylight is a new development, that takes horticulture to another level. With Light Emitting Diodes (LED) it is possible to offer plants the perfect light conditions, while other climatic factors are also completely controlled. Since there are no further external factors influencing the climate, all decisions in climate control have to be made by the grower. Effective climate control demands in depth knowledge of plant physiology. HAS University has more than 5 years experience in successfully growing crops in climate chambers exclusively lit by LED. We now offer an E-learning course to share this knowledge and experience with professionals from horticulture and related industries with special interest in vertical or city farming. Professionals working in the horticulture industry at bachelor’s level (or higher) and those with a bachelor’s degree in biology and related sciences will be accepted.