The two reasons why Lifi is faster is because the frequency band is high and the bandwidth available is large. For example, wifi is a highway, and Lifi is a high speed train. To be a little more specific, for example, if you have a LED light, it can be alternately lit and extinguished, and in units of one second, you stand 30wkm away from the LED light, then you can only see one state of the light in one second (light for one second or extinguished for one second) the amount of information you receive is 1 bit, now there is a powerful LED, it is lit and extinguished in units of .05 seconds, then you can see it in one second, and in units of .05 seconds, then you can see it in one second. With not "1 LED", but an LED array, the actual visible light domain used in the space division multiplexing. 1 LED can pass 1G, 50 LED array can pass 50G. visible light linear propagation, I feel that the future is to replace a variety of interfaces, especially computer usb interfaces, cell phone data interfaces The LEDs can be used to transmit 1G, 50G, and 50G.