1. Poor color rendering. Color rendering is a value that represents the true color of things restored by lamps. You may not believe it when you say it, the color rendering of an incandescent lamp that costs 1 yuan is better than that of an LED lamp that costs 20 yuan. The rough explanation is that incandescent lamps are heat-generating light sources, which are closer to the way the sun emits light, and the spectrum is continuous and comprehensive, but the spectrum of LEDs is very narrow, making it difficult to achieve high color rendering;

2. Strobe problem. Many people think that LED has developed for so many years, and there should be no stroboscopic. In fact, as we said before, absolutely no flicker-free lamps do not exist, it just depends on whether you are using products from regular manufacturers. Good products, stroboscopic will be much weaker, and three no products, there is no worst, only worse;

3. Blue light hazard. So far, no semiconductor can emit truly white light, and the current so-called white LEDs are actually just an extra layer of phosphors added to the blue LEDs. And the harm of blue light, the author will not go into details here, too much is too annoying;

4, the price is high. You may ask, it has been developed for so many years, and the gross cost cannot come down. In fact, LED is a kind of high-tech product. Until now, our mainland does not have our own LED lighting control chip, and most of them are from the United States, Japan, Europe, or Taiwan. And the profit of the chip accounts for more than half of the total profit of the lamp (the package, power supply, housing, etc. add up to less than half), so the price can be imagined.