In the environmental topics and the energy conservation reduces the carbon, how to improve and breakthrough previous thinking to create and innovate the novel model, are the important arguments of this thesis. In present, conventional fluorescent lamps all for the energy conservation reduces the carbon, in order to reduce the expenditure of the Radiation Power consumption and reduce CO2 emission. And the fluorescent lamps have the most important issue still exist, issue on environmental protection, mercury ingredient and recycle difficulty. In this article, we study in LEDs for the application to light guides. We apply the Monte Carlo ray tracing method to build equivalent model and a high-precise optical model of the LED light source. Based on it, we observed the optical performance on target plane by different textured surfaces.