This chapter explores the energy efficiency of various irradiation installations for greenhouse plant cultivation, emphasizing the need to optimize energy consumption, uniformity coefficient, and irradiation efficiency to enhance agricultural product quality for renewable energy. Addressing the critical challenge of maintaining a stable food supply and improving resource efficiency, especially in Ukraine’s agricultural sector, the paper underscores the growing interest in electromagnetic energy for agricultural and energy applications. Through a detailed analysis of energy conversion stages, irradiation dose impacts, and key influencing factors, the research highlights the potential benefits of optical radiation in promoting photosynthetic efficiency. The methodology focuses on energy-efficient optical energy transfer to plants, and findings illustrate the critical role of factors such as radiation source height, angle, distance, and alignment of radiation spectrum with the plant’s photosynthetic action spectrum. The chapter proposes optimization parameters for irradiation installations, underscores the significance of modern SMART systems in photosynthetic irradiation, and advocates for reducing energy losses in plant irradiation processes, which could be used as fuels in renewable energy.