the whole concept is stupid.  we wouldn't need them at all if we didn't
have red rear turn signal lenses.  detroit resists orange turn signals
because of trivial incremental cost increase.  nhtsa wants them for
safety.  the [brainless] political solution is the central brake light -
half the expense of orange signals and they still don't address the
fundamental safety issue of turn signals and brakes lights being the
same color.  a truly despicable lack of gonads...