Abstract: In various embodiments a light emitting fiber is provided as well as articles of manufacture comprising one or more light emitting fibers. In certain embodiments the light emitting fiber comprises a conductive carbon nanotube fiber; an emissive layer surrounding the carbon nanotube fiber; and a conductive outer layer disposed outside the emissive layer. In certain embodiments the light emitting fiber comprises a hole transport layer disposed between the carbon nanotube fiber and the emissive layer. In certain embodiments the light emitting fiber comprise a hole injection layer disposed between the nanotube fiber and the hole transport layer. In certain embodiments the light emitting fiber comprises an electron transport layer and, optionally an electron injection layer.