On any take besides a nano, the Stunner's really aren't going to do much from my experiences. For example, on a 75gal tank, if you were running a stripe of 4 stunner's in the front, and 4 stunner's in the back of the tank, once the main lighting would come on you wouldn't even be able to tell the Stunner's were running at that point. Now, if you have a good amount of stunner's on a smaller tank, and not as much intensity of your main lighting, the stunner's will not be washed out as easily.