There should be no problem with tungsten fixtures.
Unlike HMI or flo ballasts you do not have to worry about whether tungsten fixtures are "flicker free."
Tungsten fixtures... unlike flos or HMIs... simply do not flicker. The simple reason is that the hot tungsten filament continues to glow for an instant even after power is interrupted. The glow basically "bridges" the cycle, whether it be 50, 60 or whatever.
Then again, I suppose if the cycle was 1 or 10, yeah, they'd flicker. But not with a modern power system like 50 or 60 cycles.
Fantastic Plastic Entertainment, Inc. fantasticplastic.com