U.S. Department of energy solid state lighting products second round test results summary

Following the American Department of energy commodity solid-state lighting test engineering the first test (December 2006 -2007 February) after the second round of testing (March 2007 -5 months) has been completed. A total of 13 SSL products for a range of applications, designs and manufacturers were tested in this round. All products are used for spectral radiation measurement, goniophotometric measurement method, and the temperature test (the maximum close to the hot measurement of lamps) and closed state power is studied, but does not include the product reliability test lumen attenuation test and other forms (these will test plans in the future to).

Lighting testing laboratory test of the entire SSL lamps in accordance with the provisions of LM-79 in the inspection process, rather than the traditional test of the same grade and separate lighting fixture efficiency test, or only measured without LED control devices and arrays of electronic components and heat sink. This is because the current measurement of LED flux array devices or no standard industry testing process, on the other hand is due to the performance of LED is sensitive to temperature and have a substantial impact on performance of different lighting design for the use of LED devices and arrays, which makes the LM-79 lamp efficiency as the evaluation of SSL product efficiency on the basis of.

To make preliminary exploration of differences among different individuals of the same product, to provide reference data for other lighting technology, and taking into account the initial rotation test, the second round of the selection of products made arrangements. In order to strengthen the observation of individual differences, second sets of each bulb and lamp replacement of the two samples were tested. In order to strengthen the direct comparison between the different lamps and lanterns, each table lamps are provided with the LED version and halogen lamp version control. In order to study the difference between the test instruments and the different methods, four independent laboratories before the replacement of the light bulb and the complete test.

In addition to providing the basis for the performance of the LM-79, the photometric data published by the SSL product manufacturer are also collected and analyzed for comparison.

Analysis and comment on test results

Energy use and light output

The second round of testing of the product range, from the very small power type A-lamp bulb replacement (Liu Mingzhi is smaller than a typical 7W incandescent lamp) to large power downlight. The efficiency results also have a similar range from light / power loss halogen lamp, the light output efficiency, can compete with the fluorescence lamp and freezer display box lamp.

Two, the lack of confidence in the manufacturer's product information

In the first round of testing, we have learned that the main difference between the manufacturer's product data and the actual output, power value, the second round of the test results in general did not progress. In addition to the two product data values and test values are consistent, all other products claimed efficacy and lumen output are exaggerated 25%-35%, light output is exaggerated 30%-95%. Some products do not provide information on efficacy and light output, but contain statements that may be completely misunderstood.

The difference between the product data and the actual measured values may be due to the following reasons:

Product information on the lumen output and functional value may be LED device manufacturers announced the rated performance of LED devices. LED device performance test method until now there is not a standard to measure the performance of independent, there is no reliable method consistent through the performance of the LED device to directly and accurately predict LED devices and power supply circuit, combined with the cooling device. There are a number of product information clearly pointed out that the output and efficacy values for the LED device rather than the entire lamp. And some product information is not clear, leaving only the data to guess.

The methods and conditions used in the measurement of the performance data released by the luminaire manufacturer may differ from those specified by LM-79. In some cases, the manufacturer may specify the process they wish to follow. Or the test lab used a test process that was not used by the LM-79 (LM-79 is still the standard draft has not yet been published, some laboratories are not familiar with it). Lighting manufacturers released data may correspond to a product structure, but the structure of the product and the DOE products were tested and test different version of the specified group. Lighting manufacturers are likely to modify the data to exaggerate performance.

Three, to replace the light bulb and lamp lamp

Ignoring outliers, the general situation of CPTP in the second round of the LED test results compared with a similar CFL (compact fluorescent lamp) is as follows:

The efficiency of SSL and SSL R30 downlight replacement bulb is output CFL lights 1/2 and 3/4 SSL and SSL R30 downlight replacement bulb is the average of CFL products 2/3 SSL and SSL R30 downlight replacement bulb compared with CFL, the average beam angle and the angle of SL SSL R30 and more small lamp bulb replacement compared with CFL, the average intensity (Center Beam Candle Power) is more similar with the incandescent lamp (floodlight type), the results are as follows

The efficiency of SSL and SSL R30 downlight replacement bulb is the output of incandescent lamp products 2-3 times and SSL R30 SSL downlight replacement bulb of incandescent lamp is the average product of 2/3-3/4 (although some output more than incandescent downlight SSL downlight SSL downlight) beam and SSL R30 to replace the light bulb angle average than incandescent lamp products (except for a slightly larger a distributed R30 replacement products, SSL products, the average beam angle of 72 degrees, while the incandescent lamp is 60 degrees) the average intensity and SSL R30 SSL downlight replacement lamp is the incandescent lamp products 3/4

The data