White-light LED Used In Plant Lighting Of Landscape

. White-Light LED is a new generation of light source in the international, it has a series of advantages,for example, high luminous efficiency, small volume, saving energy and so on, it has started in the city at landscape lighting applications. In our country’s white LED application has been into a fast development period, it will become the main light source in landscape lighting.Plant lighting of landscape is an important part of the city lighting, but now the plant lighting of landscape, there are a lot of problems from design theory to the actual application, mainly including: (1) plant lighting of landscape theory lacks in China; (2) laws and regulations not perfect to plant lighting of landscape; (3) it has much color and light chaos; (4) the light pollution is serious; (5) damage the ecological environment, etc. Therefore, plant lighting of landscape design need to research and development.White-Light LED as a new light source, due to its advantage is suitable for plant lighting of landscape applications. This paper on the basis of experimental results, for a white LED used to plant lighting of landscape for a comprehensive analysis, we can get the helpful conclusion to improve plant lighting of landscape quality and to improve life quality and to improve the taste of the people in evening ,those has the important practical significance.This paper based on the theoretical analysis combined experimental study as the main research analysis method, and reached the following research results:1. Light culture as the breakthrough point, from our traditional plant cultural perspective, this paper expounds the relationship between light and plants, according to different environment of plant lighting characteristic, and white LED application in plant lighting of landscape system, and according to the characteristics of the plant that white LED application in the plant when the principles for lighting: (1) People-oriented; (2) For the light color; (3) Plant growth principle; (4) the environment harmonious principle.2. To the north part of the trees as an example, a large number of experiments as the basis, got a different plant surface of reflectance and different environment than the plant brightness, combining the people of subjective survey results, and concludes that : (1)In plant lighting of landscape the best brightness contrast between plant and background in the 4 8; (2)Surface brightness of common plant landscape lighting is recommended 2 5cd/m2 , the average intensity between the 10 66lx,and recommend plant lighting of landscape as a reference.3. In the choice of lamps power, I suggest make shapes trees as to simple geometric processing, building optics intensity of illumination, according to the relationship between the brightness and flux simple calculation, based on a verification test, the result is satisfactory.4. We recommend plants not suitable for lighting in the following case: (1)plant surface reflectivity is lower than 0.05; (2)the background brightness is higher than 1 cd/m~2; (3) plant in autumn and winter seasons change.