Uv led waveguide system with scattering for anti-fouling

An anti-biofouling system comprising a light source configured to provide UV radiation and a waveguide element, wherein the waveguide element comprises radiation transmissive material, wherein the waveguide element comprises a first face and a second face with the radiation transmissive material configured between the first face and the second face, wherein the radiation transmissive material is transmissive for the UV radiation, wherein the radiation transmissive material is a matrix material for a phase of another composition than the radiation transmissive material, wherein the phase is available in the matrix as regions with the regions having mean particle radii (a) selected from the range of 350-1200 nm and having a volume fraction selected from the range of 0.01-0.2 vol. %, wherein the waveguide element has a plate-like shape, wherein the light source is at least partly embedded in the waveguide element, and wherein the light source and the waveguide element are adapted for propagation of at least part of the UV radiation through the radiation transmissive material and subsequent emanation from at least one of the first face and the second face.