A shot on stage with LED stage lights at Zach Theatre. Sony A7Rii. 70-200mm f4.0. 1/400th shutter. While banding was not apparent to human eyes watching the play it was horrifically obvious to the electronic shutter in my Sony A7Rii.
You really don't have to go far to find banding in just about any camera that uses an electronic shutter. The camera shutters scan from top to bottom. If the light source creating the image is not a constant source there is a probability that you'll see some banding at one point or another. It's part of every alternating current light source. The only light sources that are truly constant are direct current powered light sources. In days of yore even entry level photographers knew that shooting under (badly ballasted) fluorescent lights would cause banding unless you used a shutter speed long enough to allow the band to travel all the way down each frame before the shutter closed. 1/60th was possible but 1/30th was safe. Going into shutter speeds above 1/125th of second could almost guarantee banding and I have countless examples of this fluorescent light banding in conjunction with Nikon D700's, Nikon D750's and any number of Canons. All cameras without electronic shutters.
For the last two days the folks at DPReview have been running a "Have you stopped beating your wife yet?" faux scientific article trying to explain why Sony's new a9 camera showed banding when shooting LED driven screens at a sports event. It is in response to