Studio's Lighting is not as... weak (?) as Poser's lighting. The settings do not transfer over very well, and they always need to be tweaked. The more Poser lights in a D|S scene, the brighter the scene will be. If you are using some of the DAZ global lighting, you will need to kill off some of the ambient lights to get the same effect. I have yet to figure out what the magic number is for reducing the percentage of the Poser lights in Studio.