I’m finally at home (Berlin, Germany, so 50Hz) and gave it a try: in my test, ordinary light bulbs DON’T flicker at 100fps and 125fps, anything in between or above (also at 150fps and up to 180fps, where my camera stops) flickers. I also tried variable shutter speeds, but that didn’t influence the result, so a 180° angle is fine. With higher framerates, the FS7 doesn’t allow me to adjust the framerate framewise, but in slightly bigger steps, I could image, that 149fps or 151fps might be flicker free as well, but I couldn’t try.