Light decay actually occurs after 1,000 hours, but the light decay of high-power LEDs will be smaller, and that of low-power LEDs will be larger. Of course, this is only from the perspective of the LED itself.
The biggest determinant of light attenuation is the temperature of the LED. If the heat dissipation is not done well, the temperature will be too high and the attenuation will be very fast. Generally speaking, the light attenuation of LEDs is under ideal conditions. , if it is a fluorescent lamp, because multiple lamps are used, issues such as heat dissipation, spacing between LEDs, current size, lamp housing, etc. must be considered.
The LED chip is used for photoelectricity. For a sealed LED, the chip is coated with phosphor and there is a LENS on the outside. The function of the phosphor is to change the color of the LED package into the color you want, such as white light. There is no white light chip yet. The method of producing white light LED is to use a blue chip and yellow phosphor to make white light.
Nichia has patents for LED chips and phosphors, as well as packaging patents. Generally speaking, it is packaging patents, but it is not the only one with patents, such as Lumileds and Cree, which are owned by the world's largest Philips. Osram has its own patents, especially lumileds. Because it is the first company to package high-power LEDs, its packaging patent description has great limitations on other companies.
Of course, if you want to do packaging without touching other companies’ patents, you must first be familiar with the content of the patent documents, and then bypass it or pay for the right to use the patent