Development of an ecological lighting device to reduce the growth time of agricultural plants in greenhouses

The use of LEDs in lamps is promising for effective plant growth. Plant growth lamps are designed to create artificial lighting for agricultural crops. This work is devoted to the creation of a smart LED lamp with the ability to adjust the spectral composition of radiation depending on the stage of growth and the type of plant. A number of experiments were carried out to investigate the effect of various radiation parameters on the growth characteristics of dill, parsley, green onion and cucumber seeds. The optimal radiation parameters that contribute to the acceleration of the selected model plants growth were identified. Based on the results obtained, a multi-wavelength LED lamp with an adjustable radiation composition, including blue 440 nm and red 660 nm LEDs, was developed. In the lamp, the possibility of changing the spectral composition of radiation at different stages of growth was realized. Therefore, it is possible to change the light parameters in accordance with the obtained data on the development of crops. (paper)