There is only one file type that uses the .LIGHTINGLIBRARY extension:
Painter Lighting Presets Library
Lighting presets library created and used by Corel Painter, a drawing program used to create digital artwork; stores a collection of presets, such as Gradual, Track Lighting, Warm Globe, Plain Light, and Center Spot.
Each lighting preset has different settings of brightness, distance, elevation, spread, color, exposure, and ambient lighting. You can choose a preset from the library to apply to your canvas in order to save time or maintain consistency among different projects.
To view the library of presets, selector . You can choose the preset from the drop down menu (you can also add or remove a preset) and then click .
Updated: May 24, 2019