Patent ID: 6939481

Claim:
A white light emitting phosphor blend comprising at least three phosphors, wherein the white light emitted by the phosphor blend in response to incident radiation having a peak wavelength between 360 and 420 nm comprises a color temperature between 3000K and 6500K, a CRI above 70 and an efficacy above 200 lm/W; wherein the efficacy is above 264 lm/W and the color temperature is between 3300K and 4100K for incident radiation having a peak wavelength between 370 and 405 nm; and wherein the phosphor blend comprises: about 55 to about 75 weight percent Sr 2 P 2 O 7 :Eu 2+ , Mn 2+ phoshor; about 11 to about 22 weight percent of at least one of (Ba,Sr,Ca) 2 SiO 4 :Eu 2+ phosphor; and about 13 to about 22 weight percent of at least one of (Sr,Ba,Ca,Mg) 5 (PO 4 ) 3 Cl:Eu 2+ phosphor.