1.3
1.5
1.6
CE 4/9-13 W2B 1/1/1/2/379
4
9
13
W2B
1
1
1
2
379
Light state scale number
Lightest dark state scale number
Darkest state scale number
Manufacturer identification
Optical class
Diffusion of light class
Variation in luminous transmittance class
Angle of Dependence classification
Number of the standard
1.4