The invention relates to a cosmetic light screening composition containing inanaqueous phase about 0.5 to 10 wt% of 2-phenylbenzimidazol-sulphonic acid or asaltthereof and at least one fatty phase, comprisingabout 1 to 30 wt% of a linear or cyclic polysiloxane compound of the generalformula Ia orIb,whereinX signifies R or A;A signifies a group of the formula IIa, lIb and/or Ilc;R signifies hydrogen, C1-6 alkyl or phenyl;R1 and R2 each independently signify hydrogen, hydroxy, C1-6-alkyl or C1-6-alkoxy;R3 signifies C1-6-alkyl;R4 signifies hydrogen or C1-6-alkyl;R5 and R6 each independently signify hydrogen or C1-6-alkyl;r has a value of from 0 to 250;s has a value of from 0 to 20;r +s has a value of at least 3;t has a value of from 0 to 10;v has a value of from 1 to 10; andv+t has a value of at least 3;n has a value from 1 to 6;with the proviso that in the case that s is 0 at least one X is A.
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