A light emitting apparatus comprising: a sub-mount ; a first light source on the sub-mount to generate a light having a first main wavelength band in a range of 400 nm to 500 nm; a second light source on the sub-mount to generate a light having a second main wavelength band in a range of 600 nm to 670 nm, the second light source spaced apart from the first light source ; a first transparent layer surrounding the first and second light sources (7 and 9); a wavelength conversion layer on the first transparent layer to convert at least one of the light having the first main wavelength band or the light having the second main wavelength band into a light having a third main wavelength band in a range of 500 nm to 600 nm; and a medium layer between the wavelength conversion layer and the first transparent layer , wherein at least one of the first or second light sources (7 and 10) has a first refractive index, the first transparent layer has a second refractive index, the medium layer has a third refractive index, and the wavelength conversion layer has a fourth refractive index, wherein the first to fourth refractive indexes are different from each other, wherein the light emitting apparatus further comprises a diffusion layer between the sub-mount and the first transparent layer , and wherein the diffusion layer is adapted to scatter, disperse or reflect light which is generated from the first and second light sources , and characterised in that the diffusion layer contacts a side surface of at least one of the first or second light sources , and a side surface of the diffusion layer contacts an inner surface of the wavelength conversion layer that is fixed to the sub-mount . a sub-mount ; a first light source on the sub-mount to generate a light having a first main wavelength band in a range of 400 nm to 500 nm; a second light source on the sub-mount to generate a light having a second main wavelength band in a range of 600 nm to 670 nm, the second light source spaced apart from the first light source ; a first transparent layer surrounding the first and second light sources (7 and 9); a wavelength conversion layer on the first transparent layer to convert at least one of the light having the first main wavelength band or the light having the second main wavelength band into a light having a third main wavelength band in a range of 500 nm to 600 nm; and a medium layer between the wavelength conversion layer and the first transparent layer , wherein at least one of the first or second light sources (7 and 10) has a first refractive index, the first transparent layer has a second refractive index, the medium layer has a third refractive index, and the wavelength conversion layer has a fourth refractive index, wherein the first to fourth refractive indexes are different from each other, wherein the light emitting apparatus further comprises a diffusion layer between the sub-mount and the first transparent layer , and wherein the diffusion layer is adapted to scatter, disperse or reflect light which is generated from the first and second light sources , and characterised in that the diffusion layer contacts a side surface of at least one of the first or second light sources , and a side surface of the diffusion layer contacts an inner surface of the wavelength conversion layer that is fixed to the sub-mount . <EOS>