Led plant growing lamp as a supplementary light,it can enhance the light in any time of the day, so as to help plant photosynthesis. Especially in the winter, it can extend lighting time effectively. Whether in the evening or night, it also can extend and control the light of plant scientifically and effectively, without any environmental change. In the greenhouse plants or laboratories,it can completely replace the natural light to promote plant growth. Nutrition and moisture are the essential factor in plant growth in addition to sunshine , but we can not control the nature. Now, through artificial sunlight we can artificially control the growing season for plants, shortening the time for plant growth. Research shows that blue and red light district area of energy is closest to the efficiency of photosynthesis in plants, plant can grow in the best light.LED plant growing lamp is a new type lamp that can supplement sunshine for plants growth.After application testing, the wavelength of the light is very suitable for plant growth, flowering .