IEC/EN 62471 is to assess relative optical radiation safety of different lamps and lamp system. It fully replaces IEC/EN60825 regarding the requirements of LED products energy level and adds the requirements of photobiological, including spectral irradiance and spectral radiance. According to the test data, it classify the hazard level of the products, including exemption level, low hazard level, ...
Due to the LED light source manufacturing technology development, widely application layer surface, so in order to ensuring the safety of consumers, UL established UL8750 for LED module and lighting lamps and lanterns and safety standards to regulate the LED lighting products. This standard is the industry sales LED products to North America essential safety norms, apply to the LED as the main sou...
LED power driver is one of the key parts of LED luminaries, the performance of the driver will greatly affect the product quality. The lower driver efficiency, the lower efficiency conversion ratio, this is not only influence the product quality, and also will bring the heat dissipation problem. The driver failure is the important factor to affect the LED life. Now the power driver is the reason c...
SSL (Solid State Lighting) product’s color quality is very important; people pay more and more attention to it. CRI already has 40 years history. CIR is a quantitative measure of the ability of a light source to reveal the colors of various objects faithfully in comparison with an ideal or natural light source, which is color fidelity degree. There are many problems when CRI is applied in LED at...
CE is a safety certified standard, and it is regarded as the passport to enter into European Market. From the date of Jan.2, 2013, all the electric and electronic equipments export to European Market must be marked with CE, and for the CE test, EMC is a very important part of it. EMC test includes EMI test, electrostatic immunity test, fast transient immunity test, voltage dips, short interrupt...
Different color temperature will give us a different feeling. In a different environment with the same brightness, the object’s color we can see will be a great difference. It is not difficult for us to find that there are different colors when we go to different places. There are also different color temperatures in different environment, which will also bring us a different mood. In commercial...
The ballast (resistor ballast) is a device for limiting the flow of sunlight and generating instantaneous high pressure. Following is some difference between the electronic ballast and inductance ballast. 1. Inductance Ballast is an iron core inductance coil, the inductance characteristic is when the current changes in the coil, the magnetic flux changes, resulting in the induction electromotive, ...
Now, the led COB package, in fact, we can know that most of the COB package, including Japan COB packaging technology, they are based on the package of in-board. There is N chips integrated inheritance packaged by the in-board, which is called COB technology. We all know that the underlying substrate is a copper foil, it is only a good electricity, can not do a well optical processing. MCOB is d...
When LEDs arrived on the market, their tremendous efficiency and money saving potential changed the playing field and lumens, lux and candela finally became obsolete metrics for determining light requirements for plants. Recently, people began referring to PAR, PPF and PPFD as ways to measure light in photosynthetics lighting applications. The purpose of this article is to explain what these terms...
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