Tungsten lights get very very hot. If your "modifiers" are not designed to handle the heat, you could burn down the studio. You could also start an electrical fire by overloading electrical circuits or light fixtures. (I once set a ceiling on fire by bouncing a 1000w tungsten light off it.)
There will be no flicker issues with tungsten lights.
If you're shooting digital, you can white balance to the tungsten lights with good results. You might get a less noisy image by using a blue filter over the camera lens and then white balancing. This will also save you from having to gel all the lights. If you're shooting with tungsten lights mixed with daylight, then you'll have to gel the lights instead. Personally, I've always shot digital movies by setting the camera to tungsten light or daylight depending on the situation.
Welcome to filmmaking!
Thanks - good to know about flicker and blue filter
My modifiers are standard Elly snoots, barndoors and grids, I also have a profoto softbox which has 'air flaps' for hot light use
I have a very high ceiling and concrete walls in my studio
So it should be safe - but I will still take great care with the softbox
Anyone know if elinchrom scanlights are worth it or if I can workaround with my standard heads - or maybe get a different brand of hotlight or even LED or flouro that fits elly modifiers ??