The best batteries ever invented :)
1. Canon 600EX-RT in Lastolite 54x54 softbox to camera right at 45 degree angle to front/right of batteries. Speedlite zoomed to 35mm and fired at 1/4 or 1/8 power.
2. Canon 600EX-RT in camera hotshoe directed at white foamboard to camera left. Speedlite zoomed to 80mm and fired at 1/32 or 1/64 power.
Batteries were placed on a piece of toughened glass painted black on the underside to remove double reflections. Behind the scene was a large sheet of black cardboard. Image was processed using DarkTable on Linux where the main alteration was to move the black point to remove some light spill on the background.