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Effect of Different Light Qualities on Physiological Characteristics and Growth of Tobacco in vitro under Light Emitting Diodes(LEDs) Influence of Combined Lighting with Different Red and Blue LED on Photosynthetic Characteristics and Quality of Lettuce and Evaluation of Energy Consumption Effects of Photoperiod Under Red LED on Growth and Quality of Sunflower Sprouts Influence of Combined Lighting with Different Red and Blue LED on Photosynthetic Characteristics and Quality of Lettuce and Evaluation of Energy Consumption Effects of Photoperiod Under Red LED on Growth and Quality of Sunflower Sprouts