SDCM MacAdam ellipses
The SDCM (Standard Deviation of Color Matching) value describes the color consistency (color location deviation) of light sources using the MacAdam ellipses as defined by David MacAdam.
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SDCM MacAdam ellipses
The SDCM (Standard Deviation of Color Matching) value describes the color consistency (color location deviation) of light sources using the MacAdam ellipses as defined by David MacAdam.
Uniform and color-consistent wallwashing
The smaller the SDCM value, the lower is the possible deviation of the light color from the color coordinates specified in the technical data of the light source.
All LEDs located in the first ellipse are perceived by the viewer as identical with regard to their color location (SDCM = 1). The LEDs located in the second ellipse and, under certain conditions, also in the third ellipse, are also perceived as the same or very similar. From SDCM = 4, differences are clearly recognized. Since color location deviations cannot be avoided in LED production, manufacturers of high-quality luminaires make sure that the binning of their LEDs complies to an SDCM value as low as possible.
