5 years - Sill Lighting

Colour Rendering Index CRIWhere special demands aremade with respect to colourrendering (e.g. in museums andgalleries or in quality monitoringareas), the CRI value is often notadequate and additional coloursmust be drawn upon for theevaluation. Especially thereproduction of the colour red(R9) represents a quality criterionfor this treatment. WILA NeroAccent also offers a version withPremium CRI > 95 andsimultaneously R9 (red) > 90 foreach of the three colour temperatures2700/3000/4000K.10080604020Nero Accent CRI 95Nero Accent CRI 800CRI R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R1497, 2700K 96 98 98 96 96 95 98 98 99 97 94 90 96 9897, 3000K 98 99 98 98 98 97 98 98 98 99 98 88 98 9896, 4000K 98 99 99 94 96 97 95 95 92 99 95 78 99 99Colour deviation or chromaticitystability - Mac AdamsWhen combing a large numberof LED lamps, the homogeneityof the colours is of particularimportance. Lights positionednext to one another should - inparticular in the case of verticallighting - not show any perceptiblecolour differences.Another quality criterion for thecolour perception of LEDs is itsrepresentation in the form ofMacAdams ellipses, which aregrouped around a defined chromaticitycoordinate. The lessthe dispersion of the LEDsaround the chromaticitycoordinate, the greater thehomogeneity. The number ofMacAdams ellipses, meaning thedeviation from the target chromaticitycoordinate, is given in theSDCM (Standard Deviation ofColour Matching). Deviations of< 2 SDCM are classified as being‘imperceptible to the eye’.Nero Accent< 2 SDCMDownlightsDownlights with LiteopticsDownlights with higher protectionWallwasher DownlightsDirectional Spotlightswww.wila.com 79