I've been enamored of fiber optics HMI's for years for lighting in tight spaces.  I got a terrific demo from a company called Lite Panels.  This is one of the first uses of a technology that we're going to see more of in the future, solid state lighting.  These little units are just beautiful.  You have a lighting source which is extremely efficient from a power standpoint.  It remains cool in use and creates a lovely quality of light.  It's also dimmable from 0% to 100% with little change in color temperature.