In November 2016 I was interested in combining physiograms with slow camera movement.
To make these light painting photos I used a flashlight with a dichroic filter spinning on a string from the ceiling while camera was on a slow motorized slider pointing up. There was a spiral glass table in between the camera and the light source which can be seen in lower part of photo where the light is broken down by the glass blocks that make up the table.
This is my favorite photo from that batch:
And here are the best 9 out of 20: