Yeah, I wonder if Mon-El would be more powerful on a yellow-sunned planet with less lead.
Google tells me Orange, Blue and White are also on the table, and black dwarf is well on the way to becoming a black hole, but what about a white hole?
I'm seeing an old comic about Superman under a Green Sun, and Bizarro world is under a Blue Sun that emanates Ultraviolet radiation.
To say that Kryptonians have different powers under different suns, is still a matter of their own biology, and less to do with Suns in the sky, so it's really a question of Daxamites process sunlight differently, more so than how they process different sunlight.