The swoosh I posted a few days ago was just one of several photographs I took of colored lights. I mounted the lights in a row on black mat board and used my 500mm lens and Nikon D850 camersa with the ISO at 64, the aperture set to f/20, and exposure compensation at -3.7. In Aperture Priority, this setting gave me a slow shutter speed of 1 second. Then, I moved across the room to a distance that would accommodate the 500mm lens whose minimum focusing distance is 9.8 feet, braced myself, and moved the camera. Some of the results, like this one, really intrigued me.