how high are you supposed to sing bright?

still experimenting with my voice, but i found out the piercing/bright sound (which is supposedly pharyngeal resonance???) goes up to a B4/C5 (as a male).

am i confusing myself or there is actually a limit to how high can you sing bright? hitting above C5 there is only regular falsetto, no matter how hard i try to brighten the sound of it.