High efficiency solid state directional lighting including luminescent nanocrystal particles

A solid state directional lighting device, comprising:

• a semiconductor light source emitting a primary short wavelength light;
• a light collimation lens disposed in light-reflecting relation to said semiconductor light source to generate a collimated light that follows a path of travel;
• a luminescent nanocrystal conversion layer disposed in intersecting relation to said collimated light path of travel;
• said luminescent nanocrystal conversion layer including luminescent nanocrystal particles with nano-particle sizes less than 15 nm;
• a light engine including said semiconductor light source;
• a thermally conductive substrate;
• said semiconductor light source being mounted on said thermally conductive substrate;
• said light engine including said light collimation lens disposed in light-reflecting relation to said semiconductor light source to generate a collimated light that follows a path of travel;
• said light engine including said luminescent nanocrystal conversion layer disposed in intersecting relation to said collimated light path of travel;
• a heat dissipation base attached to said thermally conductive substrate to conduct heat away from said semiconductor light source and dissipate said heat into an ambient environment.