Table 5.

Evaluation of 55 RAL color samples with the CIE∆E₂₀₀₀ (2:1:1) criterion using/not using a Light Box, CI (95%).

Without Correction	∆L	∆a	∆b	∆E2000
Without Light Box	5.83 ± 0.99	9.97 ± 1.66	9.77 ± 1.50	6.65 ± 0.58
With Light Box	5.52 ± 0.98	8.01 ± 1.44	7.25 ± 1.38	5.82 ± 0.46
With Correction	∆L	∆a	∆b	∆E2000
Without Light Box	2.35 ± 0.46	2.44 ± 0.58	2.63 ± 0.54	2.61 ± 0.27
With Light Box	1.90 ± 0.38	2.05 ± 0.46	1.93 ± 0.40	2.01 ± 0.22