Method of improving low temperature lumen maintenance of an electrodeless lamp and electrodeless lamp with improved low temperature lumen maintenance

An electrodeless lamp comprising:

• a glass body containing a medium that generates UV radiation, said glass body having an inner surface with a blend of red emitting Y2O3:Eu (YOE) phosphor particles and green emitting (Ce,Tb)MgAl11O19 (CAT) phosphor particles thereon, the YOE and CAT phosphors emitting light when excited by the UV radiation in the absence of an electrode, and the individual particles of the YOE and/or CAT phosphors being encapsulated with an aluminum-containing coating that is coated directly on the YOE phosphor particles and/or the CAT phosphor particles to thereby increase the low temperature lumen maintenance of the lamp, the CAT and YOE phosphors comprising from about 60 to 100% by weight of the blend.

(canceled)

An electrodeless lamp comprising:

• a glass body containing a medium that generates UV radiation, said glass body having an inner surface with a blend of red emitting Y2O3:Eu (YOE) phosphor particles and green emitting (Ce,Tb)MgAl11O19 (CAT) phosphor particles thereon, the YOE and CAT phosphors emitting light when excited by the UV radiation in the absence of an electrode, and the individual particles of the YOE and/or CAT phosphors being encapsulated with an aluminum-containing coating that is coated directly on the YOE phosphor particles and/or the CAT phosphor particles, the lamp having a low temperature maintenance that is greater than the low temperature maintenance of a similar lamp having the same blend of phosphors without any aluminum-containing coating on the YOE and CAT phosphor particles.