However, it's a very difficult, if not impossible thing to achieve on a small scale. Really need to have the LED firing rearward into a reflector, but then heat transfer out of the LEDs becomes very difficult. For now, the most viable option for handling that problem is to have a good control scheme where you can easily and quickly dim to an acceptably low power level when needed.
Maybe - I'm to stupid to know better, but I could "see" a two-emitter design that shares the heat sink - but only one emitter at a time is powered.
The big deal would be having a "ready-to-light" low beam emitter embedded with its own mini-reflector in the lower part of the "main" high-powered emitter's reflector.
It ain't rocket science - but as many will attest - how many you need to make to recover the "start up costs" associated with the jigs, dies and molds necessary for this Cranium-level work of art?"
The idea is an "either or" design - I agree - running two emitters next to each other is hard - especially is you want to let one of the run at 2 amps.