Melanie, You know when you work with non-global light, like the one provide in the default light sets in your library, when you replace the lighting with another set in your library, the first set of lights go away. That's not the case with global lighting. I know how to manually delete lights, but to have to do that with 20 + light objects each time I want to switch between global & non-global lighting is a real pain. I just thought there would be an easier way to do it. I just did a little experiment and guess what? It's the same with "non-global lighting", and lighting below a certain intensity will not get replaced or moved when adding a new lighting preset. Interesting... guess I never noticed that before.