Lightning is a Drupal distribution for Enterprise Authoring which enables developers to create a great authoring experience for website editors. You can find out more about Lightning on their website.
The Lightning distribution is compatible with DX8, although there are a number of modules which Lightning provides that are not compatible with DX8, see section below on Module compatibility.
Version 4 of Lightning has a number of layout builder specific modules which are recommended to be uninstalled when using DX8, find out more about this here.
Link to Distribution
The distribution can be found on Drupal.org here.
See a list below of modules and their compatibility that have been tested with Lightning and DX8