1. The high -power LED light effect is still large. LED light effects have exceeded the first three generations of light sources, but the high value is far from the theory, which means that it still has great development potential. The internal quantum efficiency of LEDs can be done very high to more than 90%, but external quantum efficiency is generally very low. If you can greatly improve the efficiency of external quantum, it can greatly improve the lighting efficiency of LED products. This is one of the key research topics of LED.

High -power LED

In addition, when talking about LED light sources, we must distinguish a few concepts. The light effect reached by the LED light source in the laboratory does not represent the light effect of existing products. It also solves a series of problems such as production processes to become batch products. Therefore, it represents the light efficiency of future products. Secondly, the light efficiency of the low color rendering index products does not represent the light effect of the high color rendering index product.

When promoting their products, some manufacturers say how much the product's light effect reaches the values of LED light sources with a relatively low color rendering index. The LED light source of the high color rendering index cannot reach the values promoted. In addition, the LED light source, the high -color temperature source is higher than the light of the low -colored light source, and the 5600K LED is higher than the 3200K LED light effect. Understand these characteristics of LED and facilitate the correct purchase of the products.

2. Improving the color rendering index is one of the important issues of LED light sources. In general, the color rendering index is high, and the light effect is often lower; the light effect is high, the color rendering index is worse. Some applications, such as film and television, stage lighting, have high requirements for the color rendering index of light sources.