How much light attenuation does LED have?

In fact, the light attenuation has already occurred in 1000 hours, but the light attenuation of high-power LED will be smaller, and the light attenuation of low-power LED will be greater. Of course, this is only from the LED itself. The biggest determinant of light attenuation is the temperature of LED. Heat dissipation is not done well, the temperature is too high, and it decays quickly. Generally speaking, the light attenuation of LED is in an ideal state. If it's a fluorescent lamp, it's because there are many.

In use, heat dissipation, led spacing, current size, lamp shell and other issues should be considered. LED chips are used for photoelectricity. A sealed led is coated with fluorescent powder and has a lens outside. The function of phosphor is to change the color of LED package into the color you want, such as white light. There is no white light chip at present. The method of manufacturing white LED is to use blue chip and yellow phosphor to manufacture white light. Riya has patents on LED chips and phosphors, as well as packaging patents. Generally speaking, packaging patents, but he is not the only one, such as Philips, which is relatively large in the world.

Lumileds, Cree and OSRAM all have their own patents, especially Lumileds, because it is the first to package high-power LED, so the description of its packaging patents has great limitations for other manufacturers. Of course, if you want to do packaging without touching other companies' patents, you must first be familiar with the contents of patent documents, and then bypass or pay for the use of patents. ...