the luminous intensity reflected in the direction considered, divided by the illumination of the reflex reflector for given angles of illumination, divergence and rotation
After undergoing the tests referred to in V.2, the reflex reflectors in each group must have: 3.1. a colour which satisfies the conditions laid down in Annex VII. This shall be verified by a qualitative method, and, in case of doubt, confirmed by a quantitative method;
3.2. a CIL which satisfies the conditions laid down in Annex VIII and after the test reaches at least 60 % of the value previously obtained with the same sample.
