The Lighting Arm-s (the S is for super bright) is an evolution of our current lighting arms, using the same LED, but with a specially designed TIR lens built into the front of the arm. This greatly improves the amount of light reaching the subject allowing you to use faster shutter speeds, lower ISO and get sharper images of your subjects.
The high brightness of these arms is even more apparent when the lights are closer to the subject, making it easier than ever to get ultimate control over your super close-up macro lighting. We consider this arm a “side-grade” rather than an upgrade. With the increased brightness from the lens, comes a narrower beam angle for the light.