I finally figured out how to get some color from Luna2! By super-heating the glass at first, then cooling (a lot), then gently heating in the back of the flame a few times, I got some beautiful purple and blue colors. Much better than the washed-out brown I usually get.
I made these beads by putting some Triton down on the mandrel, then wrapping a large blob of Luna over that. I love how the Triton makes the beads look like they have metallic end caps. They're in my Etsy shop at the moment: