Ultraviolet LED lights emitted at night are used as a substitute for sunlight for the photosynthesis process of vegetable crops in a hydroponic agricultural greenhouse in Nganjuk, East Java, Indonesia. These lamps are used to increase productivity and assist the vegetative and generative processes so that plants continue to get the nutritional intake and grow optimally for 24 hours, as a form of adaptation to climate change. The crop yields are organic and healthy because they do not contain any chemical ingredients or particles.