1. High power led luminous efficiency is still much room for improvement. led light source efficiency more than three generations ago, but the theoretical maximum value from very far, which means that it has great potential for development. led the internal quantum efficiency can do very generally be more than 90%, but the external quantum efficiency is generally low. If you can greatly improve the external quantum efficiency, road rod side of the light box lights, it can greatly improve the luminous efficiency led products. This is one of the key research project led. Also, when talking about time efficiency led light source, to distinguish between several concepts. First, the laboratory led light reaches the light effect, does not mean that the luminous efficiency of existing products, it also solve the production process and other issues to become a volume product. Therefore it represents the future of light-efficient products. Second, low color rendering index products luminous efficiency, luminous efficiency does not mean that high color rendering index products. Some manufacturers when advertising their products, shelters boxes side-emitting light strip, said light-efficient products reach the number streaming Ming Wa, community boxes side-emitting light strip, is a relatively low value of CRI led light, high color rendering index It led light up less than the advertised value. There, led light, high color temperature light source than the low color play high luminous efficiency, 5600K is higher than 3200k led the led light effects. These characteristics led to understand, easy to correctly choose the desired products. 2. To improve the color rendering index is an important issue led light. Under normal circumstances, the box side of the light lights, high color rendering index, light efficiency is often lower; high luminous efficiency, color rendering index fan. Some applications, such as film, stage lighting, color rendering index of the light source on demanding. Lighting High beam lights, light bar on the radio 2.5 m, effective skills provincial circuit rod boxes side-emitting light bar _ far illumination (certification) _ boxes side-emitting light bar by far Lighting Technology Co., Ltd. Far Lighting Technology Co., Ltd. (www.ygzmkj.com) (www.ygzmkj.com) Shandong Dezhou, advertising lighting leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. Far lighting leadership with the staff warmly welcome all inquiries negotiations to create a far better future lighting.