If the Plume Pod is working, the LED light is off. The best way to verify the status of your Pods is through the Plume App.
1. Select Settings on the menu on the top-left of the home screen.
2. Scroll down to see a list of all your Pods.
3. For iOS App users, you can view your Topology by tapping on your App home screen. A Pod is offline if it's RED.