Yes, but very little. Indeed it is necessary to maintain a minimum standby so that the device can receive an order in Wifi.
The empty consumptions are:
Priska +: 0.5W / h to 0.8W / h
Polyco: 0.5W / h to 0.8W / h
Antalya A70 bulb: 0.5W / h
This consumption is linked to the operation of the Wifi Chipset and whatever Konyks device is connected, the standby consumption will be similar, except for products that run on battery (such as Senso) which go into standby and therefore consume less.