Among designing companies in this survey, 94% of the companies undertake business and real estate projects, 76% undertake office projects, 56% undertake store projects and 52% hotel and retailing. So we can see that business and real estate projects have a big proportion in designing companies, and the trading volume of buildings is in direct proportion to the demand for commercial LED Lights and house lighting lamp s such as LED Area Light . Since 2015, real estate market took a favorable turn when the Central Bank reduced interest by twice. The financial environment tends to loose.The choosing of products has significant meaning for a successful project. So what is the basis for designers to choose their favorite brand? What is the percentage of chosen LED Lighting brands being accepted by clients? And what is the application ratio of chosen brand in the project?