BEFORE PROCEEDING, PLEASE ENABLE CLIENT CAPTURE INSIDE OF LIGHTSTREAM LABS. MORE INFO AVAILABLE IN THIS ARTICLE.
To add a new device to Lightstream, click on the Lightstream logo in the top left, click on "Account Settings", and click on "Devices". On this screen, you can download Lightstream to a new device. Once downloaded and installed, you can enter your new device code generated by the application on this screen to finish linking your new device.