Well, I'll put the cart in front of the horse this time and post the nearly finished light first, and later I'll add the WIP photos, for those who like those kind of things.
One of those commissions that I like--the customer only had one requirement--that the light have a three-level output, so I'll be using the Mini FluPIC driver and an R4 XPG LED.
I decided that I really liked the large spiraled groove that I had used in another light and I thought it would be good with the tri-level Mokume Gane as well. I also felt that I couldn't use the same theme on the head of the light--it would be too boring, so I opted for some discs and thin grooves; to accentuate those, I decided to etch the light and then cut the discs and grooves. I think that worked fine.
For the battery tube, I also felt that making the flats, left from the spiral groove and the axial grooves, shiny would also be worth trying. Those look great, imo.
The entire light looks much better in your hand than in these photos--in your hand you can see the sparkle of the facets from the etching and the contrast between the etched body and the shiny accents is more pronounced, too.
Build pics in post #8.