Almost all the LED's I've run for headlights on my mountain bikes for night riding, have a buck or booster, and some form of pulse width modulation in square wave form to modulate the amount of amperage flowed to the LED's to prevent them from being over driven, all in DC current. All of them are wired off of some form of Li Ion battery in 3.7V or multiplication verisons of it wired in series. This seems to be a good match to the forward voltage required by many LED's being produced currently, whether wired in parallel or in series.
Keep in mind, I am not an EE, just sharing with you what has worked, on a smaller scale than what you propose. Perhaps it can be scaled up?