I placed the necklace in Photo Composer, not in the center but on its left edge (ref. article „Almost spinning”). The intensity of lamps I left 100%, but I turned off front lights to not to overexpose the elements appearing in front of those lights during spinning. I used mostly left side lights and the spotlights to enhance sparkles on necklace details. That time I mounted the camera on standard tripod set it up like shown on the picture. Canon 17-40 mm lens distance to the object was 7 cm and 40 mm zoom presents nice effect.
Presentation properties: 180 degrees, 80 shots, bounce effect.