Sam Nolan

Last week we did a shot using an HMI as our only source, and after it was done realized the camera had been accidentally set to 25fps. We thought it was fine since there was no dialogue and it was a quick shot. But now I realized - the HMI ballast was not set to flicker-free, and we were on 60Hz lighting. Shutter was at 180. Can anyone give me an idea as to how likely flicker will be, and/or what it will look like (fast, slow, etc.)? Thanks.