Patent ID: 8866380

Claim:
A light-emitting arrangement, comprising: alight source adapted to emit light of a first wavelength; and a wavelength converting member comprising an organic wavelength converting material adapted to receive light of said first wavelength and to convert at least part of the received light to light of a second wavelength; and a sealing structure at least partially surrounding said wavelength converting member to form a sealed cavity containing at least said wavelength converting member, said sealed cavity containing an inert gas and oxygen gas, the concentration of oxygen gas being in the range of from 0.05 to 3% based on the total volume within said sealed cavity, wherein said wavelength converting material comprises a perylene derivative, and wherein the wavelength converting member comprises a matrix material selected from the group consisting of poly(ethylene terephthalate) (PET) and copolymers thereof, polyethylene naphthalate (PEN) and copolymers thereof, poly(methyl methacrylate) (PMMA), polystyrene, polycarbonate, silicone, polysiloxane, and acrylate polymers.