To increase efficiency, and reduce energy loss and waste, we propose to improve the photosynthetic action spectrum resemblance (SR_PAS) of LED light with the absorption spectra of the fresh leaf, for accelerating the growth of Chinese Cabbages. Eight spectral LED lights were adopted to irradiate Chinese Cabbages under 150 μmol•m⁻² s⁻¹ for a 16 hd⁻¹ photoperiod. Of these, under the irradiation of blue + broad red + more yellow (BRY₂) light with high spectrum resemblance of 75%, the fresh weight and dry weight are 5.1times and 3.0 times, respectively, and the leaf area and leaf number are 1.7 times, as high as under the blue light. The results demonstrate that the optimized LED light can be presumed to have the highest spectrum resemblance (SR_PAS) with the absorption spectra of Chinese Cabbages, and the highest energy-conversion efficiency. These conclusions may be of great benefit to further assess and find either an ideal light applied for plant growth or design of better light sources for growing different plants.

为了提高效率，减少能量损失和浪费，我们建议利用新鲜叶片的吸收光谱来改善LED光的光合作用光谱相似度（SR _PAS），以加速大白菜的生长。采用八个光谱LED灯以16 hd ^-1的光周期照射150μmol•m ^-2  s ^-1以下的大白菜。其中，在蓝色+宽红色+更多黄色（BRY ₂）的光谱相似度高达75％，鲜重和干重分别是蓝光下的5.1倍和干重的3.0倍，叶面积和叶数是1.7倍。结果表明，可以认为优化后的LED光与大白菜的吸收光谱具有最高的光谱相似度（SR _PAS），并且具有最高的能量转换效率。这些结论可能对进一步评估和找到适用于植物生长的理想光源或设计用于生长不同植物的更好光源很有帮助。