Basic Physics. Copper has a thermal transfer rate two times greater than aluminum, supporting
data. With that said, I'm looking into designs that can use common copper plumbing parts.
I have some very expensive design software that allows me to model many shapes and LED's configureations. (The gave me a 1 week trail license, its only a $10,000 per year license
) But like all things, it will come down to build it and test it.