On the fourth floor of my apartment balcony I see these lights quite often but they are too far to get an idea of their exact location. They get extremely bright, fade away completely, zoom off and appear out of nowhere. I thought they were helicopters but after I pointed them out to a few friends one night, we came to the consensus that they were not. The lights can move around each other as a pair, take turns approaching and then quickly moving away from a lone stationary light but what I can't explain is how one can appear out of nowhere while I am watching another depart to the southwest. I want to state this carefully, I am a skeptic because I've seen so many fraudulent claims. As a psychology student and prior member of the U.S. Air Force, it's rare that I fall for much, hook, line and sinker as it pertains to craft in the skies but these have me stumped. Further than that, I do notice that they dim when I think about going inside to grab somebody else and get brighter if I just try to enjoy the mystery. Not sure what that means but maybe I'll come across the subject in school soon!