It is the knowledge of the present invention that the spectrum of any light emitting device can be converted into a desired spectrum in a simple way, by providing a light emitting device with a light conversion layer, which has a dye with a conversion property, to convert the light emitted by the light emitting device into light of a different spectrum, and thereupon acting upon the spectrum conversion layer such that the dye is at least partly removed or a conversion property is destroyed. In this way, it is also possible in a simple way to structure a display of a plurality of light emitting devices to a color display, by providing a spectrum conversion layer for all light emitting devices, i.e. for converting the light emitted by the light emitting devices into light of different spectra, and to then act upon these common spectrum conversion layers in selectively chosen locations, which correspond predetermined ones of the light emitting devices, such that at these locations the dye is at least partly removed or its conversion property is destroyed, so that at these locations light, which has not been converted or only less converted, is radiated from the display.