If you have saved customized light sources to the light source library file, you can import the light sources into your catalog light source library or any project-specific light source library.
To import light sources from a light source library file:
Open the project that you want to import light sources into.
Access the light source library. How to
In the Light Sources dialog, click Transfer.
In the Open dialog, select the Lights.llb file (or whatever file you want to import light sources from), then click Open.
In the right pane of the Transfer dialog, select the custom light source you want to import, then click Import Item. Or, to import the entire list, just click Import All. The list in the left pane is updated.
Click OK.