Mitch,
Ive just used a phantom gold hd from a rental in south america, they warned us that we were not allowed to use hmi lightning at all, regardelss they were Flicker Free Electronic Ballasts or magnetic, so we had to change all our package for zillion tungsten units to fill the needed t stop x 1000 fps shooting large exteriors at night, you can imagine the kind of nightmare, we tried a 1200 Arri Flicker free HMI just to test and there was a lot of flicker, so is that possible that this camera cannot be used with HMI lights, now that we are living on the 21st century? we had another issue, with noise on black or dark areas, even though we were correctly exposed, and then a kind of vertical pattern on the image as well, that happened on the second shooting day, the footage looks terrible with that pattern over it, Please, for any future, certainly cannot use HMI lights with this camera, at 250 fps even had flicker with a 360 or 180 shutter!!!, please give me any clues if you can, Ill really appreciate it.
Best regards
Oscar