The present invention provides a light generation
system configured to provide
system light; wherein the light generation
system includes (i) a
first light generating device, (ii) a second light generating device, and (iii) a light-emitting material device; wherein: (A) the
first light generating device includes a first
solid-state
light source, the first
solid-state
light source being configured to generate
first light source light having a
wavelength selected from the
wavelength range of 430-490 nm; wherein the first light generating device is configured to generate first device light; (B) the light-emitting material device includes a first light-emitting material, the first light-emitting material being disposed downstream of the first
light source and configured to convert at least a portion of the first light source light received by the first light-emitting material into first light-emitting material light having a first
spectral power distribution in the visible
wavelength range, the first
spectral power distribution having a first
centroid wavelength (λc1); wherein the first
centroid wavelength (λc1) is selected from the
wavelength range of 615-645 nm; wherein the first light-emitting material light includes one or more emission bands having a first
full width at half maximum (FWHM1), the first... The
full width at half maximum (FWHM2) is selected from a range up to 40 nm; wherein the first
luminescent material comprises a
luminescent material of the type doped with tetravalent
manganese, wherein M comprises an alkaline earth cation, wherein M' comprises a basic cation, and x is in the range of 0-1, wherein A comprises a tetravalent cation, wherein X comprises a monovalent anion, and at least
fluorine; (C) the second light generating device comprises a second
solid-state light source; wherein the second light generating device is configured to generate second device light having a second
spectral power distribution in the visible
wavelength range, the second spectral power distribution having an
emission band having (a) a second
centroid wavelength (λc2) selected from a
wavelength range of 605-655 nm, and (b) a second
full width at half maximum (FWHM2) selected from a range up to 40 nm; and (D) the light generating system is configured such that (a) the first spectral power distribution and the second spectral power distribution at least partially overlap, (b); and (c) in the operating mode of the light generating system, the system light comprises (i) the first
luminescent material light and (ii) the second device light.