4000k high CRI led & 12v input driver? (ebike with Castle CC BEC 2.0 (12v) 48v battery)

I found what it seems to be a good host for a bike light.(ebay link )

This light will complement my Busch + Müller Lumotec IQ-X E, since I won’t see any branches coming at me on a trail. It’s very nice otherwise and don’t blind people on the streets.

I got a Zebralight H600Fc Mark IV 4000k, and it’s really nice on the trails. So, I want 4000k and high CRI.

The power supply will be the bikes battery 48v, however, I got a Castle CC BEC 2.0 Waterproof that can do 12v/7A continuously.
It’s nice with 12v since I got access to a plethora of accessories.

So, fellow connoisseurs of photons, I ask of thee:

  • What 4000k high CRI LED would you recommend for this host?
  • Is there a “12v in-driver” I could use? (bonus points for really low-low-mid-high mode)

And by all means, any other thoughts?

Thanks for your time & expertise.