The above picture sums up my problem. I'm struggling to work out what settings to put my camera on to work with my strobe light. I vaguely understand the problem; that the camera takes pictures row by row, so the lighting has changed by the time it gets to the bottom half. But I can't work out how to fix it. I would have thought that a very fast shutter speed would help, but apparently not.
The camera is a Fujifilm X-E1 and the strobe light is a cheap model with a rotary dial to change the speed. It doesn't have DMX control.