The various monochromatic Light Emitting Diode (LED) lights are widely used in growth facility for cultivating various plants, particularly horticultural crops because of their higher luminous efficiency, lower radiation and power consumption than the traditional white fluorescent lamp light. However, considerable inconsistent effects have been reported in literature. We conducted a meta-analysis to assess the effects of different colors of LED light on plant growth, development and various traits. Compared to the light from white fluorescent lamps, the red LED light significantly changed 4 out 26 plant characteristics by at least 37%, and blue LED light significantly increased 5 of 26 assessed characteristics by 37% or more. The combination of red/blue LED lights only significantly increased dry weight by 161% among 25 plant characteristics analyzed. Compared to the white LED light, red LED light significantly decreased 2 of 9 plant characteristics by at least 36%, and blue LED light significantly decreased only 1 of 9 plant characteristics, total chlorophyll content, by 42%. In the moderators analyzed, plant taxonomic families significantly influenced the effects of LED lights on shoot dry weight, and plant life cycles and plant taxonomic families significantly affected the effect on stomatal conductance. Through systematic meta-analysis, we found that the effect of LED on plant growth and quality traits was species-specific, and the effect was affected by the cultivation conditions. Therefore, we suggest that researchers be more targeted to experiment, and collect traits associated with practical production, especially related to the quality of product data, such as carotenoids, anthocyanin and other antioxidant compounds. This article is to provide more data with practical application, guide the application of LED in horticultural plant factory.

各种单色发光二极管（LED）灯由于比传统的白色荧光灯具有更高的发光效率、更低的辐射和更低的功耗，被广泛用于种植各种植物，特别是园艺作物的生长设施。然而，文献中报道了相当多的不一致的影响。我们进行了一项荟萃分析，以评估不同颜色的 LED 灯对植物生长、发育和各种性状的影响。与来自白色荧光灯的光相比，红色 LED 光显着改变了 26 种植物特性中的 4 种至少 37%，蓝色 LED 光显着将 26 种评估特性中的 5 种增加了 37% 或更多。在分析的 25 种植物特征中，红色/蓝色 LED 灯的组合仅显着增加了 161% 的干重。与白色 LED 灯相比，红色 LED 灯显着降低了 9 种植物特征中的 2 种至少 36%，而蓝色 LED 灯仅显着降低了 9 种植物特征中的 1 种，即总叶绿素含量，降低了 42%。在主持人分析中，植物分类科显着影响LED灯对茎干重的影响，植物生命周期和植物分类科显着影响气孔导度的影响。通过系统的荟萃分析，我们发现LED对植物生长和品质性状的影响具有种属特异性，其影响受栽培条件的影响。因此，我们建议研究人员更有针对性地进行实验，并收集与实际生产相关的性状，特别是与产品数据质量相关的性状，例如类胡萝卜素、花青素和其他抗氧化化合物。本文旨在提供更多的实际应用数据，指导LED在园艺植物工厂的应用。