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Considering the present situation in all areas of lighting, CRI has been captivating more and more recognition from the public. Primarily the internal environment, which has high demand for the LED color rendering (CRI). Such as low pressure sodium lamp which is apparently close to 200lm/W in luminous functionality, but monochromatic yellow light was only useful for road lighting and very few other situations. The United States Department of Energy (DOE) utilized for indoor lighting LED lights color rendering index from the prime 70 (Aug.2007) up until the recent provision of practically 80 (Dec.2009).

Preference in light quality, excellent luminous efficiency as well as high color rendering are the main elements for LED. The Shanghai Lighting Association chairman believes that white color is the product of high photosynthetic efficiency, extreme color rendering index and meeting the needs of lighting environment or to lighting operation, that is the perfect white color. Endless arguments that traditional bulb and LED replacement lighting boost competition and decisive Force issues, Director also has his specific perspective. He emphasizes, at present circumstances, LED increased light efficiency signifies the emission performance is higher than the standard light source.

The regular light sources are in the major role in several situations, if we want to match up with them, we can set the High luminous efficiency standard light source put in shield as measure, then put the led in the shield to compare, that is the favorable way. DOE current document, shows there will be regular light bulbs and fluorescent lamps MR16 review. As for CRI, for a variety of different conditions, the color rendering index is offered to a human appreciation but is not provided on some occasions, such as outdoor lighting. Some had made the detail decision, there are so much need the indoor lighting, like the home environment, CRI might be more than 80, it has grown to be popular nowadays.

LED coming into lighting market tends to clear, the concern of high luminous efficiency. The good color rendering index has presented its usefulness in the indoor lighting industry. It showed a very good performance and strong development. Therefore, when looking to LED light effect, one must be concerned about the color rendering index To talk about luminous efficiency, with out the help of CRI is not at all of any relevance.