Question 1:The Ruyilam Ring Light shows the operating light on the switch, but does not light up - is a separate installation required here?

Answer 1:

No, a separate installation is not necessary.

As soon as the lamp is connected via USB, the blue light on the switch should light up and the lamp can be switched on with the on/off button.

The ring light has a switch on the cable with the following functions: UP (brighter) / Down (darker) / ON/OFF and mode. Connect to USB port and press ON.

Then the ring light should glow. The brightness can be regulated via Up and Down.

Just plug the light's cable into the USB port.The laptop or PC probably needs to be turned on, otherwise no current will flow.it also works with a power bank.