This video talks about the quality of spectrum from various LED light sources and why it matters. IIRC they suggested amber LEDs in addition to white. https://youtu.be/5U-F7EhLp7g
These are available in 12v: https://www.superlightingled.com/single-row-rgbcct-5in1-seri...
Keep in mind, a lower voltage for the same light output means more current, so if you're doing a large build, spec your wire gauge accordingly.