Solid state lighting device having effective light mixing and control

A solid state lighting device, comprising:

• a light mixing cavity having a center axis;
• said light mixing cavity enclosed by reflective surfaces and a diffusive output window;
• a plurality of peripheral light emitters positioned within said light mixing cavity, radially outwardly of said center axis;
• a light-redirection member positioned within said cavity, said light-redirection member being centered on said center axis;
• each light emitter of said plurality of peripheral light emitters arranged to emit light rays radially inwardly toward said light-redirection member;
• at least one central light emitter mounted on said light-redirection member, said at least one central light emitter adapted to emit light rays in a radially outwardly direction so that said light rays traveling radially outwardly from said central light emitter mix with light rays traveling radially inwardly from said plurality of peripheral light emitters;
• said peripheral light emitters adapted to emit light rays of a common spectrum;
• said at least one central light emitter adapted to emit light rays in a spectrum different from said common spectrum;
• and
• a semiconductor lighting device driver disposed external to said light mixing cavity in electrical communication with each light emitter of said plurality of light emitters;
• whereby light rays emitted radially inwardly by said plurality of peripheral light emitters and light rays emitted radially outwardly by said at least one central light emitter mix with one another and are reflected from said light-redirection member and from said reflective surfaces of said light mixing cavity so that light rays of said common spectrum and light rays of said different spectrum are thoroughly mixed together prior to exiting said light mixing cavity through said diffusive output window.