Abstract: A light emitting illuminant improves a cover of a conventional light emitting device by designing the internal surface of the cover with an irregular serrated surface, such that after a strong light source of the light emitting device is projected onto the internal surface of the cover, the wavelength and the reflecting/refraction direction of the light source are changed to achieve a mixed light effect and overcome an eyesore effect of the strong light source. The external surface of the cover is designed in an arc shape and with a thickness different from that of the internal surface to constitute a lens mode, such that after the lights of the light source are mixed through the internal surface, the lens with the property of focusing/scattering lights can change the wavelength to amplify and mix the lights, so as to provide a high brightness for the light source.