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F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
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FR631164D1927-03-071927-03-19Procédé pour l'application, sur des surfaces de matière quelconque, de motifs lumineux dans l'obscurité
ExpiredFR631164A
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