Enabled Lamps.
Here you can select the lamps that will be enabled inside the Lamptier app. Simply tap a lamp's icon to toggle between enabled and disabled state - the lamp will blink in response.
If a lamp is disabled you won't be able to see and control it within the app - for example, you might want to leave out lamps controlled by movement sensors in places like corridors or bathrooms. Once you are happy with your selection, go to the Space Planer and make sure your enabled lamps are correctly placed.