Abstract: The invention relates to a cosmetic light screening composition containing, in an aqueous phase, about 0.5% to about 10 wt % of 2-phenylbenzimidazol-sulphonic acid or a salt thereof and at least one fatty phase, including about 1% to about 30 wt % of a linear or cyclic polysiloxane compound of the general formula Ia or Ib: ##STR1## wherein x is R or A;A is a group selected from the formula IIa, IIb or IIc; ##STR2## R is hydrogen, C.sub.1-6 alkyl or phenyl; R.sup.1 and R.sup.2 are each independently hydrogen, hydroxy, C.sub.1-6 -alkyl or C.sub.1-6 -alkoxy;R.sup.3 is C.sub.1-6 -alkyl;R.sup.4 is hydrogen or C.sub.1-6 -alkyl;R.sup.5 and R.sup.6 are each independently hydrogen or C.sub.1-6 -alkyl;r is from 0 to 250;s is from 0 to 20;r+s is at least 3;t is from 0 to 10;v is from 0 to 10;v+t is at least 3;n is from 1 to 6; andwhen s is 0, at least one X is A. Methods of using such compositions are also provided.