CXM-4 Product Datasheet
Chromaticity Bin Structure
Chromaticity Bins: 1931 CIE Color Space
0.48
0.46
0.44
0.42
0.4
Blackbody locus
ANSI bins C78.377-2008
Isothem lines
Standard 2-step ellipse
Standard 3-step ellipse
2400K
2700K
3000K
3500K
2200K
4000K
5000K
5700K
0.38
0.36
0.34
0.32
0.3
6500K
0.28
0.3
0.32
0.34
0.36
0.38
0.4
0.42
0.44
0.46
0.48
0.5
0.52
CIE_x
The following tables describe the chromaticity bin center points, the orientation angle for the MacAdam ellipse (θ °), and the maximum
radii for the ellipses. The ANSI Bin is provided for reference.
Center Point
Angle
θ (°)
3-step Bin
2-step Bin
CCT
CIEx
CIEy
a
b
a
b
2200K
2400K
2700K
3000K
3500K
4000K
5000K
5700K
6500K
0.5014
0.481
0.4153
0.414
53.7
53.7
53.7
53.2
54
0.0081
0.0081
0.0081
0.0042
0.0042
0.0042
0.00408
0.00414
0.00402
0.00354
0.0032
0.00285
0.0054
0.0054
0.0054
0.0028
0.0028
0.0028
0.00272
0.00276
0.00268
0.4578
0.4338
0.4073
0.3818
0.3447
0.3287
0.3123
0.4101
0.403
0.00834
0.00927
0.00939
0.00822
0.00746
0.00669
0.00556
0.00618
0.00626
0.3917
0.3797
0.3553
0.3417
0.3282
53.7
59.6
59.1
58.57
Note: Luminus maintains a +/- 0.005 tolerance on chromaticity (CIEx and CIEy) measurements
3
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