A LIGHT GENERATING SYSTEM WITH B(Lambda1)-B(Lambda2)-G(Lambda3) LEDS COVERED BY A KSIF TYPE PHOSPHOR

Abstract

The invention provides a light generating system (1000) configured to provide system light (1001), wherein the light generating system (1000) comprises a first light generating device (110), a second light generating device (120), a third light generating device (130), and a luminescent element (200); wherein: (A) the first light generating device (110) comprises a first solid state light source (10), and wherein the first light generating device (110) is configured to generate first device light (111) having a first centroid wavelength (λc1), wherein the first centroid wavelength (λc1) is selected from the range of 440-460 nm; (B) the second light generating device (120) comprises a second solid state light source (20), and wherein the second light generating device (120) is configured to generate second device light (121) having a second centroid wavelength (λc2), wherein the second centroid wavelength (λc2) is selected from the range of 485-505 nm; (C) the third light generating device (130) comprises a third solid state light source (30), and wherein the third light generating device (130) is configured to generate third device light (131) having a third centroid wavelength (λc3), wherein the third centroid wavelength (λc3) is selected from the range of 520-570 nm; (D) the luminescent element (200) comprises a first luminescent material (210) configured to convert at least part of the first device light (111) received by the first luminescent material (210) into first luminescent material light (211); wherein the first luminescent material (210) comprises a luminescent material of the type M'xM2-2xAX6 doped with tetravalent manganese, wherein M' comprises an alkaline earth cation, wherein M comprises an alkaline cation, and x is in the range of 0-1, wherein A comprises a tetravalent cation, wherein X comprises a monovalent anion, at least comprising fluorine; and (E) the light generating system (1000) is configured such that (a) the luminescent element (200) is configured in the transmissive mode, wherein less than 5% of the first device light (111) is transmitted through the luminescent element (200), (b) the second device light (121) and the third device light (131) are transmitted by the luminescent element (200); and (c) in an operational mode the system light (1001) is white light having a correlated color temperature selected from the range of 1500-6500 K and a color rendering index of at least 80.

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