If your wemo 3 way light switch is not broadcasting any wi fi name you have to reset the device. Plug in your wemo light bulbs.

Belkin Wireless Wemo Insight Switch
Wemo switch factory reset. Press the restart button for 1 second and then release. To learn how to properly reset your wemo 3 way light switch to its factory default settings click here. Select from the following options. How do you reset a wemo link. The wi fi indicator light will begin to blink green to. It should take about 60 to 90 seconds for the wemo device to restore.
Keep the reset button pressed while replugging the device to the mains power supply. Launch the step 2. The wemo light switch wi fi light will blink orange. What should i do when the wemo 3 way light switchs wi fi name is not detected by the android or ios smartphone during setup. You will be asked. Resetting using the button wi fi reset you can perform a manual reset on the wemo mini in cases where you changed your wi fi name or wi fi password and your wemo mini can no longer connect to your network.
While holding the restore button down plug your wemo device into a power outlet and continue to hold the button. Press the reset button on the bottom of the wemo link device. Unplug your wemo device. Unplug the wemo link device. Release the restore button. With the wemo mini plugged in press and hold the power button.
Hold down the restore button. Clear product info this will only clear the personalized device name icon. Tap the pencil to edit. Tap the arrow next to the wemo device name you want to reset. Switch on the wemo light bulbs. Immediately press and hold the reset button for 5 seconds.