Yes but consider this, the school busses in this county have these very bright strobes on top that are always on. Now if something 8 feet wide and 45 feet long needs that (yes I know there are children on board but still) kind of thing on top of it'* massive size and extremely noticable color then I would think that a MUCH smaller vehicle would actually benefit from turn signals that are a little more noticable.
Now to the voltage thing, if they need 24 volts to then they might could be made to work with 12. And I'd assume that would render them with a couple million less candle power than when they are easily seen from the ground at night 30,000 feet in the air.
Just my guess, correct me if im wrong.