The present invention relates to liquid filled light distributor comprising an elongated tubular body with a tube wall defining an in inner lumen filled with a liquid, said tubular body having



a proximal end closed by first closing means
a distal end closed by second closing means




Wherein the proximal end is arranged to be in optical communication with a light source and wherein the refractive index of the tube wall is n1 and the refractive index of the fluid is n2 and n1/n2