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1. (WO2018202534) WARM WHITE LED SPECTRUM ESPECIALLY FOR RETAIL APPLICATIONS

Pub. No.:    WO/2018/202534    International Application No.:    PCT/EP2018/060707
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Fri Apr 27 01:59:59 CEST 2018
IPC: H01L 33/50
F21K 9/64
F21V 9/00
C09K 11/08
C09K 11/77
Applicants: PHILIPS LIGHTING HOLDING B.V.
Inventors: PEETERS, Martinus, Petrus, Joseph
WEGH, René, Theodorus
Title: WARM WHITE LED SPECTRUM ESPECIALLY FOR RETAIL APPLICATIONS
Abstract:
The invention provides a lighting device (100) configured to provide lighting device light (101), the lighting device (100) comprising a solid state light source (10) configured to provide blue light (11) having a peak wavelength (λPWL) selected from the range of 430-455 nm, a first luminescent material (210) configured to convert part of the blue light (11) into first luminescent material light (211) and a second luminescent material (220) configured to convert part of one or more of the blue light (11) and the first luminescent material light (211) into second luminescent material light (221), wherein the solid state light source (10), the first luminescent material (210), and the second luminescent material (220) are selected to provide at a first setting of the lighting device (100) white lighting device light (101) having a CRI of at least 90, a R9 value of at least 70, and a R50 value of at maximum 465 nm, wherein the R50 value is defined as a first wavelength (λ50) in a spectral distribution of the white lighting device light (101) at the first setting, wherein the first wavelength (λ50) is a wavelength closest to the peak wavelength (λPWL) but at a longer wavelength than the peak wavelength (λPWL) of the blue light (11) where the peak intensity (I50) is 50% of the intensity (IPWL) at the peak wavelength (λPWL).