I have two handlebar mounted lights (light rider lumina 500 and a Lezine 500 lumen), and a helmet light (gemini 800 lumen).
The setup seems to work for the few night rides I get in every winter. The thing is that I will mostly rider technical trails on Fromme at night vs high speed, so I've not often had the situation or feeling that I'm moving faster than the lights can project - which to me is the scariest part of night riding. Also, I will ride familiar trails which helps.
the good news is that you will never move faster than your lights will project, ha ha!! but i catch your drift… familiar trails for sure.
pretty happy with the Gemini Duo with a bar mount 'older' Lezyne. many equivalents. that Bontrager light is awesome, wife uses it and a heavy Serfas triple on helmet. Duo is small and light on the head.