Class IA and Class IB. 5.1.4.4.1. When measured as described in paragraph 3. of Annex 4, the CIL values for red retro-reflective devices must be equal to or greater than those in Table 3, expressed in millicandelas per lux, for the angles of divergence and illumination shown. Table 3 Requirements for CIL values (Classes IA and IB) [mcd.lx-1] Class Angle of divergence α Illumination angles (in degrees) Vertical V Horizontal H 0° 0° ±10° 0° ±5° ±20° IA, IB 20' 1°30' 300 5 200 2.8 100 2.5 CIL values lower than those shown in the last two columns of Table 3 are not permissible within the solid angle having the centre of reference as its apex and bounded by the planes intersecting along the following lines:
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