The invention refers to a light module for a projection device with a LARP module, wherein especially the luminescent materials emitting in a yellow wave length scope are used as luminescent materials. The radiation emitted by the luminescent materials is divided into s polarization component and p polarization component by a polarization beam splitter. The s polarization component is divided into green and red components by means of a dichroic beam splitter. The component is respectively guided to the LCD panel of an industrial laser beam analysis meter. Another LCD panel of an industrial laser beam analysis meter is triggered by the radiation of the laser device emitted in a blue wave length scope. Accordingly, the output terminal of the industrial laser beam analysis meter provides p polarization RGB signals. The signals are guided into a polarization beam splitter, and overlaid with the p polarization radiation in the yellow wave length scope before penetrating the LCD panel. Accordingly, the output terminal provides RGBY signals, wherein all output radiation of materials is switched without etendue loss.