Patent ID: 9028129
Filing Date: 2015-05-12
Classification: F21K,F21V,F21Y,G02B

Abstract:
1. An LED lamp, comprising: a light guide configured as an open-ended hollow body surrounding an internal volume and extending along a longitudinal axis between a proximal end and a distal end, the light guide comprising an inner major surface and an outer major surface; a housing at the proximal end of the light guide, the housing comprising a proximal end retaining member configured to retain the proximal end of the light guide, the light guide rotatable about the longitudinal axis relative to the housing and the proximal end retaining member to vary an angular position of the light guide relative to the housing and the proximal end retaining member; a light source fixedly mounted to the housing and adjacent a light input edge at the proximal end of the light guide to edge light the light guide such that light from the light source propagates along the light guide by total internal reflection at the outer and inner major surfaces, the light guide rotatable relative to the light source to vary an angular position of the light guide relative to the light source; and a spectrum-adjusting region fixedly mounted to the light input edge of the light guide and comprising a spectrum-adjusting material, the spectrum-adjusting region configured to progressively adjust the combined spectrum of the light from the light source input to the light guide as a function of the angular position of the light guide relative to the light source, the spectrum adjusting region comprising: