Abstract: A polymer composition on the base of (co)polymer of ethylene for transforming an ultraviolet light into a red spectral range comprising from 0.005-1.0% by weight of a tri-component mixture additives and a compatible carrier, the rest by the weight of the total composition, said tri-component mixture comprising component A, selected from the group of oxide, organic or inorganic salt of Eu, component B, selected from the group of beta-diketones and component C, selected from the group of bidentate nitrogen heterocycles or from trialkyl substituted phosphine oxide.