The main light is a Picolite with a honeycomb grid and a small aperture mask coming from the back left. The low position of this light creates long shadows. The narrow angle of the light is achieved by the supplementary use of an aperture mask with the honeycomb (you can see it gets dark on the back edge).
On the right side, there is a Striplite 60 whose position is very low in order not to create any double shadow and this light creates a soft and even reflection on the right side of the rings.
Two more projection spots are hitting the rings to make them shine. One is hitting the very top of the front ring, the other one the ring at the back. If you can catch some light, it is possible to work with mirrors, but you then cannot change the power.
