[Text / high-tech LED reporter Liu Pingping] Recently, CLEAR plans the fourth round of test results released, the test results show that 87% of LED spotlight products color rendering index is below 80 of the ENERGY STAR standard.
This round of LED spotlights has a total of 23 models from 23 brand manufacturers. Of the products tested, only three were marked with a color rendering index. Among them, there are only two standard Ra80 products that meet the requirements of ENERGY STAR, and the compliance rate is only 9%. None of the three products marked with a color rendering index met the ENERGY STAR standard.
It is understood that the color rendering index coefficient (Kaufman) is currently a common method for defining the color rendering of light sources. The color rendering index of an incandescent lamp is defined as 100 and is considered to be the ideal reference source. In different places, the requirements for color rendering index are different. Some light sources that require precise color contrast need to have a color rendering index of Ra90-100, while ordinary household lighting requires a relatively low color rendering index, probably in Ra60. -79.
"At present, the mainstream 3w and 4w LED spotlights on the market can reach more than 85. However, because there is no uniform standard in the industry, it is not surprising that many companies have only 80 or less products." Shenzhen Juzuo Lighting Co., Ltd. Xiao Ling, the general manager, said that in the absence of standards, companies will produce products according to the different needs of the market, resulting in some parameters of the products.
Xiao Ling told reporters that the higher the index, the lower the luminous flux and light efficiency, so it is not excluded that some companies sacrifice their means to ensure the light efficiency of the product.
Li Shuqiang, chief engineer of Shandong Inspur Huaguang Optoelectronics Co., Ltd., told reporters that the color rendering index is mainly caused by the different proportions of various chromatograms in the phosphor. "To ensure the display of the lamp beads, the process in the powder mixing process will be relatively complicated, and the price of such a lamp bead will be relatively high."
This round of LED spotlights has a total of 23 models from 23 brand manufacturers. Of the products tested, only three were marked with a color rendering index. Among them, there are only two standard Ra80 products that meet the requirements of ENERGY STAR, and the compliance rate is only 9%. None of the three products marked with a color rendering index met the ENERGY STAR standard.
It is understood that the color rendering index coefficient (Kaufman) is currently a common method for defining the color rendering of light sources. The color rendering index of an incandescent lamp is defined as 100 and is considered to be the ideal reference source. In different places, the requirements for color rendering index are different. Some light sources that require precise color contrast need to have a color rendering index of Ra90-100, while ordinary household lighting requires a relatively low color rendering index, probably in Ra60. -79.
"At present, the mainstream 3w and 4w LED spotlights on the market can reach more than 85. However, because there is no uniform standard in the industry, it is not surprising that many companies have only 80 or less products." Shenzhen Juzuo Lighting Co., Ltd. Xiao Ling, the general manager, said that in the absence of standards, companies will produce products according to the different needs of the market, resulting in some parameters of the products.
Xiao Ling told reporters that the higher the index, the lower the luminous flux and light efficiency, so it is not excluded that some companies sacrifice their means to ensure the light efficiency of the product.
Li Shuqiang, chief engineer of Shandong Inspur Huaguang Optoelectronics Co., Ltd., told reporters that the color rendering index is mainly caused by the different proportions of various chromatograms in the phosphor. "To ensure the display of the lamp beads, the process in the powder mixing process will be relatively complicated, and the price of such a lamp bead will be relatively high."
Stator and rotor laminations are an important part of motors and generators. For small-size and large batch laminations, we usually use the progressive punching. The advantage of progressive punching is that it can be mass-produced in a short time. But the cost of the progressive punching die is high and manufacturing period of progressive punching die is long. Usually the outer diameter is under 300mm.
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