Because wi-fi uses radio waves to transmit information, so when there is a wi-fi interference, it does not, it does not work. Therefore, Li-fi, it is necessary to solve the problem.
The wi-fi use radio waves to transmit data. So when there was no interference wi-fi was not working fully. Li-fi, so it is necessary to solve the problem.
Because Wi-Fi uses radio waves to transmit data. So when the interference is not Wi-Fi cannot work properly. So Li-fi is necessary to solve the problem.