If your luminaire is connected to a wall switch you need to make sure the wall switch is turned on. The Hue luminaire needs to be powered in order for you to be able to control it. When powered it will relay Zigbee commands to the other lights (Mesh network). If you have a wall dimmer, please replace it with a regular on/off switch. Using a wall dimmer can influence light performance and decrease the bulb’s life time.