You can customize the light source library by adding and editing light sources. Most manufacturers of lighting equipment provide downloadable .IES photometric data files free of charge on their web sites for use in lighting calculations. Once you’ve added a light source to your library, you can edit its intensity and color if you want.
Light sources are listed in groups so you can organize and find them easily. You can create and delete groups.
When you edit the light source library in your catalog, the light sources are saved with your catalog. When you edit the light source library while editing an element, the light source is saved in your current drawing only.