Colonel Boles formation in Lower Cave. It is named after the first superintendant of Carlsbad Caverns National Park, Col. Thomas Boles, who served from 1927-1946. Our workshop instructor set this shot up. There are two strobe lights mounted on tripods behind me. One on the left and one on the right. One strobe is on the ground near the model (note the bright jeans and hands) and one behind the column to light the back of the room.