Patent ID: 7132786

Claim:
A light source arrangement comprising a radiation source that emits radiation from the wavelength range 400 to 500 nm of the spectrum, and a mixture of luminescent materials arranged to receive said radiation, wherein one of said luminescent materials has a Ce-activated garnet structure having the formula A 3 B 5 O 12 , in which the first component A contains at least one element from the group consisting of Y, Lu, Se, La, Gd, and Sm and the second component B contains at least one element from the group consisting of Al, Ga and In, wherein another of said luminescent materials has a Ce-activated garnet structure having the formula A 3 B 5 O 12 , in which the first component A contains at least one element from the group consisting of Y, Lu, Se, La, Gd, Sm and Tb and consists at least in part of Tb as a constituent of the host lattice, and the second component B contains at least one element from the group consisting of Al, Ga and In, wherein said radiation is at least partially converted into longer-wave radiation by said mixture of luminescent materials.