The United States DOE on more warm white LED pinned up

According to the report of the United States DOE, and now they note that the performance of LED will be more warm white LED and more efficient lighting transition. Over the next two years, the top two manufacturers continue to expand the luminous efficiency of the competition will ease down, because they will adjust the strategy, return to the mission to expand the scope of business.

These are the results of the 2009-2014's five year plan for solid state lighting, which has just been introduced by DOE, and it shows that the attention of manufacturers will soon be removed from efficiency. Fred Advisors from Radcliffe Welsh to participate in the preparation of the report, he said: there are a lot of things to be solved, and now we have to improve the efficiency to a desired height".

The report by the DOE surgeon, a large collection of the last American SSL company (including Philips Lumileds, OSRAM Department of USA and Cree company) in the light emitting efficiency of LED results, the data exceeds the expected value. For example, in September last year, Cree released a cold white LED 129lm/W (color 5813K), but the report also raised some of the more inefficient warm white standard, namely luminous efficiency in color temperature is 2950K when the value is up to 99lm/W.

Pictured above from the DOE report, it identifies the target of efficiency: the red dashed line represents the upper limit of the luminous efficiency of the cold white LED, and the yellow dotted line is the maximum value of the warm white light. "The luminous efficiency of the lab's Leng Baiguang (DOT) is actually rising exponentially," said Welsh. "We had a lot of discussion about whether or not it will continue.

In addition, I think we should have more things to solve, such as the quality of light, and now it has become a product to market the most important factor. We love to see, there are a number of highly efficient products appear on the market; now it is also stressed that the market needs more warm white LED such as indoor home lighting, which is difficult to get involved in the field of cold white light."