Type Transmit-
tance (%)
Polarizing Efficiency Hue Remarks
a(NBS) b(NBS)
5215-Z
46±2 ≥72 16.0±3.0 -26.0±3.0 Violet
5215-U
54±2 ≥55 -6.0±2.5 -16.0±2.5 Blue
5215-X
40±2 ≥97 -0.5±2.5 3.0±2.5 Gray