TM-30 and CRI which is better? The United States Department of energy said......

The United States Department of energy said, TM-30 new evaluation method of color rendering of light sources is better than CRI (CRI).

Scientists at the United States Department of energy compared to TM-30 and CRI, represented by the illuminating engineering society of North America (IES) released in 2015 TM-30 "in a number of light color is more accurate".

That long detection results of TM-30 graphics, visual indicator light and how the difference between the reference source.

The International Commission on illumination CRI is put forward in the last century in 30s, a long time they also recognize the color of CRI to evaluate the presence of LED light is insufficient, especially in the light of how to accurately represent the deep red hue saturation color. But they also opposed evaluation methods such as TM-30.

Some experts believe that the industry should turn to the TM-30 and CRI metrics, including independent color fidelity, including color gamut elements. But opponents argue that TM-30 and CRI for the commercially available LED light source for color effect is almost the same, so no need to TM-30.

However, by the Pacific Northwest National Laboratory (Pacific Northwest National Laboratory) Department of Energy Research Report Michael Royer written using LED light source sample is much larger than before, compare the color fidelity.

These samples include fluorescent lamp, incandescent lamp and high intensity discharge lamps and fluorescent powder combination is relatively simple based on LED.

On the light source on the market, test shows that there is a high correlation between TM-30 and CRI. But with other light sources, the situation is not the same. The color index of 80 light values ranging from 50 to 86, ranging from TM-30 fidelity.

Now, the industry of phosphor converted LED appears more and more new evaluation method, some LED also uses three kinds of mixture to improve the red phosphor. (compiled: LED James)

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