A security feature for safeguarding value documents, comprising: a luminescence pigment that has a host lattice doped with a first luminophore and a second luminophore and that is optically excitable to emit luminescence light, wherein substance amount fraction of the second luminophore in the luminescence pigment lies between 50 ppm and 2000 ppm, wherein an emission band of the first luminophore overlaps with an absorption band of the second luminophore and the luminescence pigment is configured that an excitation energy of the first luminophore generated through optical excitation of the luminescence pigment is transferable to the second luminophore through an interaction between the first luminophore and the second luminophore, characterized in - that the substance amount fraction (x) of the first luminophore in the luminescence pigment and the substance amount fraction (y) of the second luminophore in the luminescence pigment are chosen such that an incomplete transfer of the excitation energy from the first to second luminophore is achieved, wherein the luminescence light of the luminescence pigment has a luminescence spectrum with a first luminescence peak emitted by the first luminophore and a second luminescence peak emitted by the second luminophore, wherein the share of the peak intensity (I B) of the second luminescence peak is at least 20% and at most 80%, preferably at least 30% and at most 70%, particularly preferably at least 40% and at most 60% in the sum of the peak intensities (I A, I B) of the first and of the second luminescence peak, and - that the peak wavelengths of the first and the second luminescence peak are shifted to greater wavelengths in comparison to the optical excitation of the luminescent pigment, and - that the first and the second luminophores are chosen from the rare earth ions erbium, holmium, neodymium, thulium, ytterbium, and - that the host lattice is configured as an inorganic host lattice and that the host lattice is a host lattice with a garnet structure or with a perovskite structure or an oxide or a wolframate or phosphate or niobate or tantalate or silicate or aluminate. - that the substance amount fraction (x) of the first luminophore in the luminescence pigment and the substance amount fraction (y) of the second luminophore in the luminescence pigment are chosen such that an incomplete transfer of the excitation energy from the first to second luminophore is achieved, wherein the luminescence light of the luminescence pigment has a luminescence spectrum with a first luminescence peak emitted by the first luminophore and a second luminescence peak emitted by the second luminophore, wherein the share of the peak intensity (I B) of the second luminescence peak is at least 20% and at most 80%, preferably at least 30% and at most 70%, particularly preferably at least 40% and at most 60% in the sum of the peak intensities (I A, I B) of the first and of the second luminescence peak, and - that the peak wavelengths of the first and the second luminescence peak are shifted to greater wavelengths in comparison to the optical excitation of the luminescent pigment, and - that the first and the second luminophores are chosen from the rare earth ions erbium, holmium, neodymium, thulium, ytterbium, and - that the host lattice is configured as an inorganic host lattice and that the host lattice is a host lattice with a garnet structure or with a perovskite structure or an oxide or a wolframate or phosphate or niobate or tantalate or silicate or aluminate.