To add new lights must be done on Android first.
Had a problem with the Apple Tittle app when adding a new light. It won't let you add it anymore, no 'next' button. To workaround you'll need an Android device and find the Tittle APK file online and install it. Still works on that platform. Follow the same steps as you would on the Apple app to link to the network. After you get it on the network you can access it in the Apple Tittle App. Hope this helps someone out there!