Technical Design-in Guide Engine QLE G2 PRE KIT | 01-2019 | 1.0 | en
Optical Aspects
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6.2. Coordinates and tolerances
6.2.1. Light colours
QLE G2 PRE KIT covers all the light colours below.
2,700
K
3,000
K
3,500
K
4,000
K
4,500
K
5,000
K
5,500
K
6,000
K
6,500
K
Centre x0
0.4578
0.4335
0.4013
0.3778
0.3596
0.3448
0.3324
0.3220
0.3123
Centre y0
0.4101
0.3964
0.3783
0.3651
0.3548
0.3465
0.3395
0.3336
0.3282
MacAdam ellipse 100 – 50 % dimming
level
3 SDCM
MacAdam ellipse 50 – 10 % dimming
level
4 SDCM
MacAdam ellipse 10 – 3 % dimming level
6 SDCM
6.3. CRI, Ra and Ri - different colour rendering values
The CRI (colour rendering index) and Ra (arithmetic average) value are different names for the same thing. They are defined as the
“effect of an illuminant on the colour appearance of objects by conscious or unconscious comparison with their colour appearance
under a reference illuminant”.
