This is a fun question to answer. I can offer you a solution that is both dramatic and energy efficient, even though that’s not exactly what you’re asking for. What I would recommend is doing a run of shielded and dimmable LED light for each shelf. This will eliminate the typical shadowing that happens when the illumination comes from a light source in the center of the ceiling. This will make everything from your Manolo Blahnik’s to your sock monkey slippers look like prized possessions. I would choose a color temperature in the 3000K to 4000K range so that you have good color rendition when putting outfits together. A high CRI of 90 to 95 will really enhance the subtleties of varying shades.