When you import a Poser file it imports the lights that are included with that file... and sometimes it freaks out, and instead of putting the lights where they were to begin with it puts them all right in the middle... the only way around it is to open up the .pz3 file that you're importing, on it's own, and either delete out all the lights in the scene, or save the figure that you wanted to import into one of the character libraries... then when you want to add it into the scene you're working on, you can either import the .pz3 file again, without the lights, or add it to the scene from your character library.