There may be a fault in the socket or wire, resulting in unstable current, which affects the WiFi connection. In addition, the light may be on because the bulb uses energy-saving lamps, or is controlled by remote control and other ways. It is recommended to check whether the sockets and wires are normal, and repair or replace them in time if there is any problem. You can also try to restart the WiFi router or change the location.
In the face of this problem, first of all, we should check whether the wires connected from the switch of the control socket circuit to the various sockets are not in good contact, falling off and oxidizing, and whether the screws of the wire through the core are tightened.
The wifi at home is not connected to the socket, the socket has no power, the lamp has power, because the lamp and the socket are two lines, it should be the socket circuit breaker disconnected