Topic of the light decay of led lamps
Although the light decay of LED lamps is better than that of incandescent lamps and fluorescent lamps, the problem of luminous decay cannot be completely overcome. The light decay of LED mainly has the following factors: the quality of the LED product itself, the quality of the LED chip used is not good, and the brightness decays quickly. In addition, if the heat dissipation is not good, the light attenuation will also increase, and the life of the LED lamp bead will be greatly shortened. The lamp must use good aluminum to ensure heat dissipation. At present, a large number of plastic and glass LED tubes on the market have severely insufficient heat dissipation and short life span. There are defects in the production process, and the heat dissipation of the LED chip cannot be well derived from the PIN pin, which causes the high temperature of the LED chip to increase the attenuation of the chip. Using conditions, LEDs are driven by constant current, and some LED lights are driven by voltage, which causes the LED to decay too fast. The driving current is greater than the rated driving conditions. In fact, there are many reasons for the light decay of LED products, but the most critical one is the heat dissipation problem. The better the heat dissipation performance, the lower the operating temperature of the LED, the smaller the light decay, and the longer the LED life.
In fact, the light decay of lamps is a necessary process for the work of lamps. When selecting lamps, we should try our best to choose lamps with better quality and heat dissipation performance. During use, the work load of the lamps should also be reduced as much as possible to delay the speed of light decay. , Extend the life of lamps and lanterns. Whether to cope with light decay varies from place to place. First, look at the need for illuminance. If it is an office area, the working surface illuminance may really need 300lx. If it does not meet the standard, it will cause discomfort such as fatigue. Therefore, places with illuminance requirements, such as offices, museums, stadiums, etc., must meet strict illuminance standards, and the life of LED light sources is relatively long, we need to consider that they must meet that standard after two years, so we At the beginning of the design, it is necessary to leave a margin. But for a hotel, is there really a difference between 300lx and 200lx? In fact, there is no difference, because the illuminance is not important at that time. What is more important is whether the distribution of illuminance meets the conversion and creation purpose of atmosphere and scene, as well as the control of glare. In hotel applications, we pay more attention to the feeling of people walking in. In the construction of the entire light environment, the specific illuminance is not much different, because people's visual perception is very flexible.
Some special occasions, such as the illuminance of a salon venue, the highest place is more than 1000lx, and the darkest place is 10lx. It does not feel very comfortable, and the contrast of light and dark is quite atmospheric. The hotel needs this effect, so for the hotel Generally speaking, illuminance is not so important, that is to say, a certain range of light attenuation is not so important. It depends on the occasion and requirements of use. If the decorative effect is used, it only needs to have colorful colors, such as red, green, blue and other LED tubes. There is no need to consider the problem of light decay, and only pay attention to the color effect. Only two issues need to be considered at this time. The first is safety and reliability, try to improve the reliability, and there should be no damage in the middle, so as not to affect the overall decoration effect. The second is waterproof. If used outdoors, the waterproof level should be at least IP65-IP68, otherwise, don't Keep it outdoors. If the water leaks, the direct result is damage, and if it is not handled well, it will be easy to leak electricity. At this time, safety and reliability have become our main consideration.
