LEDs: need to grow crystals and need to wire them. Also cooling and control are an issue. New Wake Forest nanoparticle lighting method: no wiring, no crystals. So it seems the latter would be far superior, provided you can eliminate the need for expensive elements like Iridium and Indium. Further, one might speculate that the nanoparticles would be heterogeneous, thus enabling getting a "white" spread spectrum without need for phosphors or downconversion, and controllable color by mixing on the right mix of different nanoparticles. I presume the nanoparticles each have semiconductive LED-like activity, also Antenna-like activity, they involve "nanotubes." However, the provided details were very vague on how it works. -- Warren D. Smith http://RangeVoting.org <-- add your endorsement (by clicking "endorse" as 1st step)