– UPDATE 2/2/2018 -See: Using the Configuration Installer with LightningThroughout the development and support lifecycle of a site, it is often necessary to install a fresh version of your application in a new environment with all of the existing site’s configuration. For example, a new developer might need to set up their environment for the first time or your CI system might want a fresh install for tests. Basically:

Source: Creating a new instance of an existing site | Acquia Lightning