According to Taiwan's ITRI IEK data,it shows that in 2010 the global LED replacement light source (LED-bulb-based) value (market size) is of about 10.8 billion U.S. dollars, it is estimated it will be up to $ 2.2 billion in 2011, the annual growth rate is 100% , in 2014, it will challenge the scale of $ 10 billion.As it will be more popular the LED will replace light source,engineer of Osram Opto Semiconductors,Jun Lee thinks, the cost must be the most important condition that LED lighting becomes universal.When LEDs are ready to enter the daily life, there is no way to re-continued high prices.The size of LED die decides part of the cost, the greater Wafer,the more LED die can be produced basically, the LED will be of relatively low cost. But as per each cross a level ,it is difficult to adjust yield on the factory, because LED requires brightness and wavelength uniformity must be very stable.Standards are also important factors. At present, the regions have different standards for LED lighting products, components, modules, systems, but overall, the development of LED lighting standards is behind the industrial development.Others such as light quality, reliability, but also the key conditions to affect the popularity of LED lighting.In addition, experience in LED lighting of manufacturers , is also very important. For example, the LED does not heat, its luminous flux is not the same high as traditional LED light source, they have to rely on vendors to be addressed. Finally, vendors must also provide related support for LED applications, such as chips, packaging, etc., in order to promote the use of LED light sources.According to the survey, about 20% of global energy is used for lighting, visible lighting applications accounted for the high proportion of global energy consumption. Analysts believe that if all the global lightings are changed into LED lighting, it will be of great help for the overall energy savings.