Jiangxi Province in the industry landscape project to install Ltd. (www.jxzhongye.com.cn) located in four two high-tech business park on the 18th floor, Nanchang, Jiangxi, Nanchang Gaoxin Road, Contact: Xiongjing Li industry in Jiangxi Province Landscape Engineering Installation Co., Ltd., founded in 1994. 20 years of landscape design company which, in the industry, adhering to the "Albert Hing China, a human light" corporate mission, to create the industry's well-known "in the industry" brand. In today has grown into a company with many years in the landscape lighting project design, budgeting, construction site management, installation, LED electronic products R & D, manufacturing and sales of high-tech enterprises. Companies with urban and road lighting engineering contractor qualification, special lighting engineering design B qualification, intelligent building three qualifications. When the electrical characteristics of the light emitting diode LED in the LED forward state when the voltage reaches its light-emitting, LED light emission is started, the voltage continues to increase, LED emission luminance increases dramatically as the voltage increases again slightly, LED may be instantly destroyed, whereby Visible, LED belongs to a current device, it is this characteristic that determines the LED must work in order to secure a constant current state, which is a key factor in the use of LED devices with other major inconsistency of light, LED's also safe to use requires full attention of the designer points. Figure One is the power of 1W LED chip forward drive current and the output brightness relationship, can be seen, lumen output drive current and showed significant linear relationship in the 350mA range. However, with an increase in forward current landscape design, gradually emerging non-linear relationship between the two. When the drive current exceeds the linear range, lumens per watt efficiency generated will be reduced, but within the linear range, the number of lumens per watt produced will show an upward trend. When the driving current exceeds the linear range of the power converter will cause the output from the LED to the form of heat, this heat can be a burden to the LED driver, designed to increase the complexity of the heat and reduces the LED life. So for 1W power LED devices urban landscape design, its forward drive current does not exceed 350mA. Ф5 currently used for small power LED lamp beads How can the urban landscape design, forward current not exceeding 20mA. For 3W high power LED chip, forward current should not exceed 700mA. Jiangxi Province in the industry landscape project to install landscape lighting Engineering Limited is engaged in the design, budgeting, construction site management, installation, LED electronic products R & D, manufacturing and sales of high-tech enterprises. Companies with urban and road lighting engineering contractor qualification, special lighting engineering design B qualification, intelligent building three qualifications. Jiangxi Province in the industry landscape project to install landscape lighting Engineering Limited is engaged in the design, budgeting, construction site management, installation, LED electronic products R & D, manufacturing and sales of high-tech enterprises. Companies with urban and road lighting engineering contractor qualification, special lighting engineering design B qualification, intelligent building three qualifications. In 1968, research and development of LED lights made a breakthrough technology to make efficient use of nitrogen-doped GaAsP devices reached a lumens / watt, LED energy-saving lamps and can emit red, orange and yellow light. 1971, launched a GaP green LED chips with the same efficiency, LED began widely used in digital technology applications and text display area.