Patent ID: 8998452
Filing Date: 2015-04-07
Classification: F21K,F21Y,G02B

Abstract:
1. A light bulb, comprising: a base configured to mechanically mount the light bulb and receive electrical power; a light guide to propagate light by total internal reflection, the light guide comprising light input regions, at least one of the light input regions associated with an optical modifying characteristic; and a light source electrically coupled to the base and located adjacent the light input regions, the light source and light input regions variably positionable relative to one another to vary a location at which light is incident on the light input regions such that light emitted from the light source is selectively apportioned between the light input regions so that a characteristic of the light output from the light bulb is modified based on the optical modifying characteristic of the at least one of the light input regions and the relative positioning of the light source and the light input regions, wherein one of the light input regions comprises an optical element.