Patent ID: 8547009

Claim:
A lighting structure comprising: a semiconductor light emitting device configured to generate light responsive to an electrical signal applied thereto; and an encapsulating material configured to transmit light generated by the semiconductor light emitting device wherein the encapsulating material includes luminescent phosphor particles and non-luminescent diffuser particles therein, wherein the phosphor particles comprise a phosphor host material doped with a luminescent activator, wherein the non-luminescent diffuser particles comprise the phosphor host material, wherein a first concentration of the non-luminescent diffuser particles in a first portion of the encapsulating material adjacent the semiconductor light emitting device is different than a second concentration of the non-luminescent diffuser particles in a second portion of the encapsulating material more distant from the semiconductor light emitting device, and wherein the first and second concentrations are greater than zero; wherein the first portion of the encapsulating material includes a first layer of encapsulating material including the luminescent phosphor particles, and wherein the second portion of the encapsulating material includes a second layer of encapsulating material including the non-luminescent diffuser particles, wherein the second layer of encapsulating material is substantially free of the luminescent phosphor particles.